Billy the Kid
|Died||14 July 1881 (aged 21–22)|
|Cause of death||Gunshot wound|
|Resting place||Old Fort Sumner Cemetery|
|Other names||William H. Bonney, Henry Antrim, Kid Antrim|
|Height||5 ft 7 in (1.70 m) at age 17|
Billy the Kid (born Henry McCarty; September 17 or November 23, 1859 – July 14, 1881), also known by the pseudonym William H. Bonney, was an outlaw and gunfighter of the American Old West, who is alleged to have killed 21 men before he was shot and killed at the age of 21. He also fought in New Mexico's Lincoln County War, during which he allegedly committed three murders.
McCarty was orphaned at the age of 15. His first arrest was for stealing food at the age of 16 in 1875. Ten days later, he robbed a Chinese laundry and was arrested again but escaped shortly afterwards. He fled from New Mexico Territory into neighboring Arizona Territory, making himself both an outlaw and a federal fugitive. In 1877, he began to call himself "William H. Bonney".
After killing a blacksmith during an altercation in August 1877, McCarty became a wanted man in Arizona and returned to New Mexico, where he joined a group of cattle rustlers. He became well known in the region when he joined the Regulators and took part in the Lincoln County War of 1878. He and two other Regulators were later charged with killing three men, including Lincoln County Sheriff William J. Brady and one of his deputies.
McCarty's notoriety grew in December 1880 when the Las Vegas Gazette, in Las Vegas, New Mexico, and The Sun, in New York City, carried stories about his crimes. Sheriff Pat Garrett captured McCarty later that month. In April 1881, McCarty was tried for and convicted of Brady's murder, and was sentenced to hang in May of that year. He escaped from jail on April 28, killing two sheriff's deputies in the process, and evaded capture for more than two months. Garrett shot and killed McCarty, by then aged 21, in Fort Sumner on July 14, 1881.
During the decades following his death, legends grew that McCarty had survived, and a number of men claimed to be him. Billy the Kid remains one of the most notorious figures from the era, whose life and likeness have been frequently dramatized in Western popular culture. He has been a feature of more than 50 movies and several television series.
Henry McCarty was born to parents of Irish Catholic ancestry, Catherine (née Devine) and Patrick McCarty, in New York City. A theory suggests that he was born on September 17, 1859, in New York City. He was baptized "Patrick Henry McCarthy" at the Church of St. Peter on September 28, 1859.[failed verification] While his birth year has been confirmed as 1859, the exact date of his birth has been disputed as either September 17 or November 23 of that year. A letter from an official of Saint Peter's Church in Manhattan states it is in possession of records showing McCarty was baptized there on September 28, 1859.[a] Census records indicate his younger brother, Joseph McCarty, was born in 1863.
Following the death of her husband Patrick, Catherine McCarty and her sons moved to Indianapolis, Indiana, where she met William Henry Harrison Antrim. The McCarty family moved with Antrim to Wichita, Kansas, in 1870. After moving again a few years later, Catherine married Antrim on March 1, 1873, at the First Presbyterian Church in Santa Fe, New Mexico Territory; McCarty and his brother Joseph were witnesses to the ceremony. Shortly afterward, the family moved from Santa Fe to Silver City, New Mexico, and Joseph McCarty began using the name Joseph Antrim. Shortly before McCarty's mother, Catherine, died of tuberculosis, then called "consumption", on September 16, 1874, William Antrim abandoned the McCarty boys, leaving them orphans.
McCarty was 15 years old when his mother died. Sarah Brown, the owner of a boarding house, gave him room and board in exchange for work. On September 16, 1875, McCarty was caught stealing food. Ten days later, McCarty and George Schaefer robbed a Chinese laundry, stealing clothing and two pistols. McCarty was charged with theft and was jailed. He escaped two days later and became a fugitive, as reported in the Silver City Herald the next day, the first story published about him. McCarty located his stepfather and stayed with him until Antrim threw him out; McCarty stole clothing and guns from him. It was the last time the two saw each other.
After leaving Antrim, McCarty traveled to southeastern Arizona Territory, where he worked as a ranch hand and gambled his wages in nearby gaming houses. In 1876, he was hired as a ranch hand by well-known rancher Henry Hooker. During this time, McCarty became acquainted with John R. Mackie, a Scottish-born criminal and former U.S. Cavalry private who, following his discharge, remained near the U.S. Army post at Camp Grant in Arizona. The two men soon began stealing horses from local soldiers. McCarty became known as "Kid Antrim" because of his youth, slight build, clean-shaven appearance, and personality.
On August 17, 1877, McCarty was at a saloon in the village of Bonita when he got into an argument with Francis P. "Windy" Cahill, a blacksmith who reportedly had bullied McCarty and on more than one occasion called him a "pimp". McCarty in turn called Cahill a "son of a bitch", whereupon Cahill threw McCarty to the floor and the two struggled for McCarty's revolver. McCarty shot and mortally wounded Cahill. A witness said, "[Billy] had no choice; he had to use his equalizer." Cahill died the following day. McCarty fled but returned a few days later and was apprehended by Miles Wood, the local justice of the peace. McCarty was detained and held in the Camp Grant guardhouse but escaped before law enforcement could arrive.
McCarty stole a horse and fled Arizona Territory for New Mexico Territory, but Apaches took the horse from him, leaving him to walk many miles to the nearest settlement. At Fort Stanton in the Pecos Valley, McCarty—starving and near death—went to the home of friend and Seven Rivers Warriors gang member John Jones, whose mother Barbara nursed him back to health. After regaining his health, McCarty went to Apache Tejo, a former army post, where he joined a band of rustlers who raided herds owned by cattle magnate John Chisum in Lincoln County. After McCarty was spotted in Silver City, his involvement with the gang was mentioned in a local newspaper. At some point in 1877, McCarty began to refer to himself by the name "William H. Bonney".
Lincoln County War
After returning to New Mexico, McCarty worked as a cowboy for English businessman and rancher John Henry Tunstall (1853–1878), near the Rio Felix, a tributary of the Pecos River, in Lincoln County (now in Chaves County). Tunstall and his business partner and lawyer Alexander McSween were opponents of an alliance formed by Irish-American businessmen Lawrence Murphy, James Dolan, and John Riley. The three men had wielded an economic and political hold over Lincoln County since the early 1870s, due in part to their ownership of a beef contract with nearby Fort Stanton and a well-patronized dry goods store in the town of Lincoln.
By February 1878, McSween owed $8,000 to Dolan, who obtained a court order and asked Lincoln County Sheriff William J. Brady to attach nearly $40,000 worth of Tunstall's property and livestock. Tunstall put Bonney in charge of nine prime horses and told him to relocate them to his ranch for safekeeping. Meanwhile, Sheriff Brady assembled a large posse to seize Tunstall's cattle.
On February 18, 1878, Tunstall learned of the posse's presence on his land and rode out to intervene. During the encounter, one member of the posse shot Tunstall in the chest, knocking him off his horse. Another posse member took Tunstall's gun and killed him with a shot to the back of his head. Tunstall's murder ignited the conflict between the two factions that became known as the Lincoln County War.
After Tunstall was killed, McCarty and Dick Brewer swore affidavits against Brady and those in his posse, and obtained murder warrants from Lincoln County justice of the peace John B. Wilson. On February 20, 1878, while attempting to arrest Brady, the sheriff and his deputies found and arrested McCarty and two other men riding with him. Deputy U.S. Marshal Robert Widenmann, a friend of McCarty, and a detachment of soldiers captured Sheriff Brady's jail guards, put them behind bars, and released McCarty and Brewer.
McCarty then joined the Lincoln County Regulators; on March 9 they captured Frank Baker and William Morton, both of whom were accused of killing Tunstall. Baker and Morton were killed while allegedly trying to escape.
On April 1, the Regulators ambushed Sheriff Brady and his deputies; McCarty was wounded in the thigh during the battle. Brady and Deputy Sheriff George W. Hindman were killed. On the morning of April 4, 1878, Buckshot Roberts and Dick Brewer were killed during a shootout at Blazer's Mill. Warrants were issued for several participants on both sides, and McCarty and two others were charged with killing Brady, Hindman and Roberts.
Battle of Lincoln (1878)
On the night of Sunday, July 14, McSween and the Regulators—now a group of fifty or sixty men—went to Lincoln and stationed themselves in the town among several buildings. At the McSween residence were McCarty, Florencio Chavez, Jose Chavez y Chavez, Jim French, Harvey Morris, Tom O'Folliard, and Yginio Salazar, among others. Another group led by Marin Chavez and Doc Scurlock positioned themselves on the roof of a saloon. Henry Newton Brown, Dick Smith, and George Coe defended a nearby adobe bunkhouse.
On Tuesday, July 16, newly appointed sheriff George Peppin sent sharpshooters to kill the McSween defenders at the saloon. Peppin's men retreated when one of the snipers, Charles Crawford, was killed by Fernando Herrera. Peppin then sent a request for assistance to Colonel Nathan Dudley, commandant of nearby Fort Stanton. In a reply to Peppin, Dudley refused to intervene but later arrived in Lincoln with troops, turning the battle in favor of the Murphy-Dolan faction.
A shooting war broke out on Friday, July 19. McSween's supporters gathered inside his house; when Buck Powell and Deputy Sheriff Jack Long set fire to the building, the occupants began shooting. McCarty and the other men fled the building when all rooms but one were burning. During the confusion, Alexander McSween was shot and killed by Robert W. Beckwith, who was then shot and killed by McCarty.
McCarty and three other survivors of the Battle of Lincoln were near the Mescalero Indian Agency when the agency bookkeeper, Morris Bernstein, was murdered on August 5, 1878. All four were indicted for the murder, despite conflicting evidence that Bernstein had been killed by Constable Atanacio Martinez. All of the indictments, except McCarty's, were later quashed.
On October 5, 1878, U.S. Marshal John Sherman informed newly appointed Territorial Governor and former Union Army general Lew Wallace that he held warrants for several men, including "William H. Antrim, alias Kid, alias Bonny [sic]" but was unable to execute them "owing to the disturbed condition of affairs in that county, resulting from the acts of a desperate class of men." Wallace issued an amnesty proclamation on November 13, 1878, which pardoned anyone involved in the Lincoln County War since Tunstall's murder. It specifically excluded persons who had been convicted of or indicted for a crime, and therefore excluded McCarty.
On February 18, 1879, McCarty and friend Tom O'Folliard were in Lincoln and watched as attorney Huston Chapman was shot and his corpse set on fire. According to eyewitnesses, the pair were innocent bystanders forced at gunpoint by Jesse Evans to witness the murder. McCarty wrote to Governor Wallace on March 13, 1879, with an offer to provide information on the Chapman murder in exchange for amnesty. On March 15, Governor Wallace replied, agreeing to a secret meeting to discuss the situation. McCarty met with Wallace in Lincoln on March 17, 1879. During the meeting and in subsequent correspondence, Wallace promised McCarty protection from his enemies and clemency if he would offer his testimony to a grand jury.[b]
On March 20, Wallace wrote to McCarty, "to remove all suspicion of understanding, I think it better to put the arresting party in charge of Sheriff Kimbrell [sic] who shall be instructed to see that no violence is used."[c] McCarty responded on the same day, agreeing to testify and confirming Wallace's proposal for his arrest and detention in a local jail to assure his safety. On March 21, McCarty let himself be captured by a posse led by Sheriff George Kimball of Lincoln County. As agreed, McCarty provided a statement about Chapman's murder and testified in court. However, after McCarty's testimony, the local district attorney refused to set him free. Still in custody several weeks later, McCarty began to suspect Wallace had used subterfuge and would never grant him amnesty. McCarty escaped from the Lincoln County jail on June 17, 1879.
McCarty avoided further violence until January 10, 1880, when he shot and killed Joe Grant, a newcomer to the area, at Hargrove's Saloon in Fort Sumner, New Mexico. The Santa Fe Weekly New Mexican reported, "Billy Bonney, more extensively known as 'the Kid,' shot and killed Joe Grant. The origin of the difficulty was not learned." According to other contemporary sources, McCarty had been warned Grant intended to kill him. He walked up to Grant, told him he admired his revolver, and asked to examine it. Grant handed it over. Before returning the pistol, which he noticed contained only three cartridges, McCarty positioned the cylinder so the next hammer fall would land on an empty chamber. Grant suddenly pointed his pistol at McCarty's face and pulled the trigger. When it failed to fire, McCarty drew his own weapon and shot Grant in the head. A reporter for the Las Vegas Optic quoted McCarty as saying the encounter "was a game of two and I got there first."
In 1880, McCarty formed a friendship with a rancher named Jim Greathouse, who later introduced him to Dave Rudabaugh. On November 29, 1880, McCarty, Rudabaugh, and Billy Wilson ran from a posse led by sheriff's deputy James Carlysle. Cornered at Greathouse's ranch, McCarty told the posse they were holding Greathouse as a hostage. Carlysle offered to exchange places with Greathouse, and McCarty accepted the offer. Carlysle later attempted to escape by jumping through a window but he was shot three times and killed. The shootout ended in a standoff; the posse withdrew and McCarty, Rudabaugh, and Wilson rode away.
A few weeks after the Greathouse incident, McCarty, Rudabaugh, Wilson, O'Folliard, Charlie Bowdre, and Tom Pickett rode into Fort Sumner. Unbeknownst to McCarty and his companions, a posse led by Pat Garrett was waiting for them. The posse opened fire, killing O'Folliard; the rest of the outlaws escaped unharmed.
Capture and escape
On December 13, 1880, Governor Wallace posted a $500 bounty for McCarty's capture. Pat Garrett continued his search for McCarty; on December 23, following the siege in which Bowdre was killed, Garrett and his posse captured McCarty along with Pickett, Rudabaugh, and Wilson at Stinking Springs. The prisoners, including McCarty, were shackled and taken to Fort Sumner, then later to Las Vegas, New Mexico. When they arrived on December 26, they were met by crowds of curious onlookers.
The following day, an armed mob gathered at the train depot before the prisoners, who were already on board the train with Garrett, departed for Santa Fe. Deputy Sheriff Romero, backed by the angry group of men, demanded custody of Dave Rudabaugh, who during an unsuccessful escape attempt on April 5, 1880 shot and killed deputy Antonio Lino Valdez in the process. Garrett refused to surrender the prisoner, and a tense confrontation ensued until he agreed to let the sheriff and two other men accompany the party to Santa Fe, where they would petition the governor to release Rudabaugh to them. In a later interview with a reporter, McCarty said he was unafraid during the incident, saying, "if I only had my Winchester I'd lick the whole crowd." The Las Vegas Gazette ran a story from a jailhouse interview following McCarty's capture; when the reporter said Bonney appeared relaxed, he replied, "What's the use of looking on the gloomy side of everything? The laugh's on me this time." During his short career as an outlaw, McCarty was the subject of numerous U.S. newspaper articles, some as far away as New York.
After arriving in Santa Fe, McCarty, seeking clemency, sent Governor Wallace four letters over the next three months. Wallace refused to intervene, and McCarty went to trial in April 1881 in Mesilla, New Mexico. Following two days of testimony, McCarty was found guilty of Sheriff Brady's murder; it was the only conviction secured against any of the combatants in the Lincoln County War. On April 13, Judge Warren Bristol sentenced McCarty to hang, with his execution scheduled for May 13, 1881. According to legend, upon sentencing, the judge told McCarty he was going to hang until he was "dead, dead, dead"; McCarty's response was, "you can go to hell, hell, hell." According to the historical record, he did not speak after the reading of his sentence.
Following his sentencing, McCarty was moved to Lincoln, where he was held under guard on the top floor of the town courthouse. On the evening of April 28, 1881, while Garrett was in White Oaks collecting taxes, Deputy Bob Olinger took five other prisoners across the street for a meal, leaving James Bell, another deputy, alone with McCarty at the jail. McCarty asked to be taken outside to use the outhouse behind the courthouse; on their return to the jail, McCarty—who was walking ahead of Bell up the stairs to his cell—hid around a blind corner, slipped out of his handcuffs, and beat Bell with the loose end of the cuffs. During the ensuing scuffle, McCarty grabbed Bell's revolver and fatally shot him in the back as Bell tried to get away.
McCarty, with his legs still shackled, broke into Garrett's office and took a loaded shotgun left behind by Olinger. McCarty waited at the upstairs window for Olinger to respond to the gunshot that killed Bell and called out to him, "Look up, old boy, and see what you get." When Olinger looked up, McCarty shot and killed him.  After about an hour, McCarty freed himself from the leg irons with an axe. He obtained a horse and rode out of town; according to some stories he was singing as he left Lincoln.
Recapture and death
While McCarty was on the run, Governor Wallace placed a new $500 bounty on the fugitive's head. Almost three months after his escape, Garrett, responding to rumors that McCarty was in the vicinity of Fort Sumner, left Lincoln with two deputies on July 14, 1881, to question resident Pete Maxwell, a friend of McCarty's. Maxwell, son of land baron Lucien Maxwell, spoke with Garrett the same day for several hours. Around midnight, the pair sat in Maxwell's darkened bedroom when McCarty unexpectedly entered.
Accounts vary as to the course of events. According to the canonical version, as he entered the room, McCarty failed to recognize Garrett due to the poor lighting. Drawing his revolver and backing away, McCarty asked "¿Quién es? ¿Quién es?" (Spanish for "Who is it? Who is it?"). Recognizing McCarty's voice, Garrett drew his revolver and fired twice. The first bullet struck McCarty in the chest just above his heart, while the second missed. Garrett’s account leaves it unclear whether McCarty was killed instantly or took some time to die.
A few hours after the shooting, a local justice of the peace assembled a coroner's jury of six people. The jury members interviewed Maxwell and Garrett, and McCarty's body and the location of the shooting were examined. The jury certified the body as McCarty's and, according to a local newspaper, the jury foreman said, "It was the Kid's body that we examined." McCarty was given a wake by candlelight; he was buried the next day and his grave was denoted with a wooden marker.
Five days after McCarty's killing, Garrett traveled to Santa Fe, New Mexico, to collect the $500 reward offered by Governor Lew Wallace for his capture, dead or alive. William G. Ritch, the acting New Mexico governor, refused to pay the reward. Over the next few weeks, the residents of Las Vegas, Mesilla, Santa Fe, White Oaks, and other New Mexico cities raised over $7,000 in reward money for Garrett. A year and four days after McCarty's death, the New Mexico territorial legislature passed a special act to grant Garrett the $500 bounty reward promised by Governor Wallace.
Because people had begun to claim Garrett unfairly ambushed McCarty, Garrett felt the need to tell his side of the story and called upon his friend, journalist Marshall Upson, to ghostwrite a book for him. The book, The Authentic Life of Billy, the Kid,[d] was first published in April 1882. Although only a few copies sold following its release, in time, it became a reference for later historians who wrote about McCarty's life.
Rumors of survival
Over time, legends grew claiming that McCarty was not killed, and that Garrett staged the incident and death out of friendship so that McCarty could evade the law. During the next 50 years, a number of men claimed they were Billy the Kid. Most of these claims were easily disproven, but two have remained topics of discussion and debate.
In 1948, a central Texas man, Ollie P. Roberts, also known as Brushy Bill Roberts, began claiming he was Billy the Kid and went before New Mexico Governor Thomas J. Mabry seeking a pardon. Mabry dismissed Roberts' claims, and Roberts died shortly afterward. Nevertheless, Hico, Texas, Roberts' town of residence, capitalized on his claim by opening a Billy the Kid museum.
John Miller, an Arizona man, also claimed he was McCarty. This was unsupported by his family until 1938, some time after his death. Miller's body was buried in the state-owned Arizona Pioneers' Home Cemetery in Prescott, Arizona; in May 2005, Miller's teeth and bones were exhumed and examined, without permission from the state. DNA samples from the remains were sent to a laboratory in Dallas and tested to compare Miller's DNA with blood samples obtained from floorboards in the old Lincoln County courthouse and a bench where McCarty's body allegedly was placed after he was shot. According to a July 2015 article in The Washington Post, the lab results were "useless".
In 2004, researchers sought to exhume the remains of Catherine Antrim, McCarty's mother, whose DNA would be tested and compared with that of the body buried in William Bonney's grave. As of 2012[update], her body had not been exhumed.
In 2007, author and amateur historian Gale Cooper filed a lawsuit against the Lincoln County Sheriff's Office under the state Inspection of Public Records Act to produce records of the results of the 2006 DNA tests and other forensic evidence collected in the Billy the Kid investigations. In April 2012, 133 pages of documents were provided; they offered no conclusive evidence confirming or disproving the generally accepted story of Garrett's killing of McCarty, but confirmed the records' existence, and that they could have been produced earlier. In 2014, Cooper was awarded $100,000 in punitive damages but the decision was later overturned by the New Mexico Court of Appeals. The lawsuit ultimately cost Lincoln County nearly $300,000.
In February 2015, historian Robert Stahl petitioned a district court in Fort Sumner asking the state of New Mexico to issue a death certificate for McCarty. In July 2015, Stahl filed suit in the New Mexico Supreme Court. The suit asked the court to order the state's Office of the Medical Investigator to officially certify McCarty's death under New Mexico state law.
One of the few remaining artifacts of McCarty's life is a 2-by-3-inch (5.1-by-7.6-centimeter) ferrotype photograph of McCarty by an unknown portrait photographer in late 1879 or early 1880. The image shows McCarty wearing a vest under a sweater, a slouch hat and a bandana, while holding an 1873 Winchester rifle with its butt resting on the floor. For years, this was the only photograph scholars and historians agreed showed McCarty. The ferrotype survived because McCarty's friend Dan Dedrick kept it after the outlaw's death. It was passed down through Dedrick's family, and was copied several times, appearing in numerous publications during the 20th century. In June 2011, the original plate was bought at auction for $2.3 million by businessman William Koch.
The image shows McCarty wearing his holstered Colt revolver on his left side. This led historians to believe he was left-handed, but they did not take into account that the ferrotype process produces reversed images. In 1954, western historians James D. Horan and Paul Sann wrote that McCarty was right-handed and carried his pistol on his right hip. The opinion was confirmed by Clyde Jeavons, a former curator of the National Film and Television Archive. Several historians have written that McCarty was ambidextrous.
A 4-by-6-inch (100 mm × 150 mm) ferrotype purchased at a memorabilia shop in Fresno, California, in 2010 has been claimed to show McCarty and members of the Regulators playing croquet. If authentic, it is the only known photo of Billy the Kid and the Regulators together and the only image to feature their wives and female companions.  Collector Robert G. McCubbin and outlaw historian John Boessenecker concluded in 2013 that the photograph does not show McCarty. Whitny Braun, a professor and researcher, located an advertisement for croquet sets sold at Chapman's General Store in Las Vegas, New Mexico, dated to June 1878. Kent Gibson, a forensic video and still image expert, offered the services of his facial recognition software, and stated that McCarty is indeed one of the individuals in the image.
In August 2015, Lincoln State Monument officials and the New Mexico Department of Cultural Affairs said that despite the new research, they could not confirm that the image showed McCarty or others from the Lincoln County War era, according to Monument manager Gary Cozzens. A photograph curator at the Palace of the Governors archives, Daniel Kosharek, said the image is "problematic on a lot of fronts," including the small size of the figures and the lack of resemblance of the background landscape to Lincoln County or the state in general. Editors from the True West Magazine staff said, "no one in our office thinks this photo is of the Kid [and the Regulators]."
In early October 2015, Kagin's, Inc., a numismatic authentication firm, said the image was authentic after a number of experts, including those associated with a recent National Geographic Channel program, examined it.
Posthumous pardon request
In 2010, New Mexico Governor Bill Richardson turned down a request for a posthumous pardon of McCarty for the murder of Sheriff William Brady. The pardon considered was to fulfill Governor Lew Wallace's 1879 promise to Bonney. Richardson's decision, citing "historical ambiguity," was announced on December 31, 2010, his last day in office.
In 1931, Charles W. Foor, an unofficial tour guide at Fort Sumner Cemetery, campaigned to raise funds for a permanent marker for the graves of McCarty, O'Folliard, and Bowdre. As a result of his efforts, a stone memorial marked with the names of the three men and their death dates beneath the word "Pals" was erected in the center of the burial area.
In 1940, stone cutter James N. Warner of Salida, Colorado, made and donated to the cemetery a new marker for Bonney's grave. It was stolen on February 8, 1981, but recovered days later in Huntington Beach, California. New Mexico Governor Bruce King arranged for the county sheriff to fly to California to return it to Fort Sumner, where it was reinstalled in May 1981. Although both markers are behind iron fencing, a group of vandals entered the enclosure at night in June 2012 and tipped the stone over.
Billy the Kid, his life and life events have been represented in Comics, Literature, Film, Music, Stage, Radio, Television, and Video games.
- Letter from Rev. James B. Roberts, Church of St. Peter, New York City, to Jack DeMattos, March 24, 1979.
- For years Wallace denied that he had agreed to the bargain with McCarty; however, in a newspaper article published in 1902, Wallace changed his story and said he had promised McCarty a pardon in change for the testimony.
- Letter from Governor Wallace to W.H. Bonney, March 20, 1879.
- The full title of the Garrett-Upson book was The Authentic Life of Billy, the Kid, the Noted Desperado of the Southwest, Whose Deeds of Daring and Blood Made His Name a Terror in New Mexico, Arizona and Northern Mexico. By Pat. F. Garrett, Sheriff of Lincoln Co., N.M., By Whom He Was Finally Hunted Down and Captured by Killing Him.
- Nolan, Frederick (2015). The West of Billy the Kid. University of Oklahoma Press. p. 29. ISBN 978-0-8061-4887-8. Archived from the original on September 2, 2021. Retrieved July 1, 2019.
- Utley 1989, p. 15.
- Rasch 1995, pp. 23–35.
- Wallis 2007, pp. 244–245.
- Wallis 2007, p. 144.
- Utley 1989, pp. 145–146.
- "The Old Man Who Claimed to Be Billy the Kid". Atlas Obscura. March 30, 2017. Archived from the original on July 8, 2017. Retrieved July 19, 2017.
- "Life and death of Billy the Kid". The Clare Champion. July 15, 2010. Archived from the original on February 26, 2020. Retrieved November 13, 2020.
- Carson, William J. (May 1969). "What was Billy the Kid's real name?". Real West Magazine.
- Transcript of "Certificate of Baptism", Church of St. Peter, Barclay Street, New York. "This is to certify that Patrick Henry McCarthy, child of Patrick and Catherine Devine, born in NY on the 17 day of September 1859, was baptized on the 28 day of September 1859 according to the rite of the Roman Catholic Church, by the Rev. J. Conron. The sponsors being Thomas Cooney and Mary Clark, as appears from the Baptismal Register of this Church."
- An image of the Certificate of Baptism was published in Real West magazine, May 1969 in an article entitled: "What was Billy the Kid's real name?", by William J. Carson. It indicates that the person's name was "Patrick Henry McCarthy", not Henry McCarty.
- DeMattos 1980.
- Nolan 2009a, pp. 1–6.
- Rasch & Mullin 1953, pp. 1–5.
- Rasch 1954, pp. 6–11.
- Nolan 1998, pp. 15, 29.
- Wallis 2007, p. 15.
- Nolan 1998, pp. 17–19.
- Nolan 2009a, p. 7.
- Nolan 2009a, p. 8.
- "Billy The Kid: Facts, information and articles about Billy The Kid, famous outlaw, and a prominent figure from the Wild West". HistoryNet.com. Archived from the original on January 3, 2016. Retrieved January 4, 2016.
- Grant County Herald (Silver City, New Mexico), September 26, 1875.
- Wallis 2007, pp. 94–95.
- Wallis 2007, p. 103.
- "Billy the Kid". State of New Mexico. Archived from the original on January 26, 2016. Retrieved January 6, 2016.
- Utley 1989, pp. 10–11.
- Wallis 2007, p. 107.
- Utley 1989, pp. 11–12.
- Wallis 2007, pp. 110–111.
- Utley 1989, p. 16.
- Radbourne, Allan; Rasch, Philip J. (August 1985). "The Story of 'Windy' Cahill". Real West (204): 22–27.
- "This Date in History – August 17, 1877 – Billy the Kid kills his first man". History Channel. Archived from the original on March 15, 2016. Retrieved January 17, 2016.
- Wroth, William H. "Billy the Kid". New Mexico Office of the State Historian. Archived from the original on January 26, 2016. Retrieved February 10, 2016.
- Wallis 2007, p. 119.
- Nolan 1998, p. 77.
- Hays, Chad (March 19, 2013). "Ma'am Jones A stitch in time". True West Magazine. Archived from the original on December 22, 2015. Retrieved February 10, 2016.
- Wallis 2007, pp. 123–131.
- Nolan 2009a, pp. 188–190.
- Boardman, Mark (September 25, 2010). "The Tunstalls Return – John Tunstall's kin traveled from England to fathom death in Lincoln". True West Magazine. Archived from the original on February 16, 2016. Retrieved February 10, 2016.
- Utley 1989, p. 46.
- Nolan 2009a, pp. 23–55.
- Utley 1989, pp. 48–49.
- Bell, Bob Boze (April 1, 2004). "I Shot the Sheriff (and I Killed a Deputy, Too) – Billy Kid and the Regulators vs Sheriff Brady and His Deputies". True West Magazine. Archived from the original on February 16, 2016. Retrieved February 10, 2016.
- Bell, Bob Boze (September 11, 2015). "Tunstall Ambushed – Regulators vs Dolan's Henchmen". True West Magazine. Archived from the original on February 16, 2016. Retrieved February 11, 2016.
- Utley 1989, pp. 56–60.
- Nolan 2009a, pp. 233–49, 549.
- Rickards, Colin. The Gunfight at Blazer's Mill, 1974 – pp. 36–37.
- Wroth, William H. Billy the Kid Archived January 26, 2016, at the Wayback Machine. Retrieved January 9, 2016.
- Jacobsen 1994, p. 173.
- Nolan 1992, pp. 312–313.
- Utley 1987, p. 87.
- Nolan 1992, p. 513.
- "New Mexico Office of the State Historian | people". newmexicohistory.org. Archived from the original on June 29, 2017. Retrieved July 19, 2017.
- Nolan 1992, pp. 322–331.
- Utley 1987, pp. 96–111.
- Utley 1989, pp. 104–105, 107, 110.
- Nolan 2009a, pp. 339–340, 342, 445, 514.
- Utley 1987, p. 120.
- Nolan 2009a, pp. 315, 515.
- Utley 1987, pp. 122–123, 126–128, 141, 150, 154, 156–158.
- Utley 1987, pp. 132–136, 139, 141, 143–144.
- Nolan 1992, pp. 375–376, 378, 516–517.
- Cooper 2017, pp. 556–561.
- Cooper 2017, pp. 563–565.
- Cooper 2017, p. 565.
- Boomhower 2005, p. 103.
- Boomhower 2005, p. 104.
- Boomhower 2005, pp. 106–107.
- Lifson 2009.
- Utley 1989, pp. 111–125.
- Bell, Bob Boze (May 2, 2007). "The Tale of the Empty Chamber Billy the Kid vs Joe Grant". True West Magazine. Archived from the original on February 16, 2016. Retrieved January 10, 2016.
- Santa Fe Weekly New Mexican, January 17, 1880.
- Utley 1989, pp. 131–133, 145, 203, 249–250.
- Nolan 1992, pp. 397, 518, 572.
- "Deputy Sheriff James Carlysle". The Officer Down Memorial Page (ODMP). Archived from the original on September 25, 2020. Retrieved November 19, 2020.
- Utley 1989, pp. 143–146, 179, 204.
- Nolan 1992, pp. 398–401.
- Metz 1974, pp. 74–75.
- Utley 1989, pp. 155–157, 256–257.
- Utley 1989, p. 147.
- Wallis 2007, p. 240.
- "Deputy Sheriff Antonio Lino Valdez profile". The Officer Down Memorial Page, Inc. Archived from the original on November 27, 2020. Retrieved December 30, 2019.
- Wallis 2007, pp. 126–127.
- Metz 1974, pp. 76–85.
- Utley 1989, pp. 157–166.
- "Book Review: Billy the Kid's Writings, Words & Wit, by Gale Cooper". HistoryNet. November 29, 2012. Archived from the original on September 19, 2015. Retrieved February 10, 2016.
- Utley 1989, pp. 145–147.
- Wallis 2007, pp. 240–241.
- Wallis 2007, p. 242.
- "1881 Billy the Kid is shot to death". History.com. Archived from the original on February 15, 2016. Retrieved February 10, 2016.
- Nolan, Frederick (April 28, 2015). "'What if everything we know about Billy the Kid is wrong?' – Special Report". True West Magazine. Archived from the original on February 16, 2016. Retrieved February 12, 2016.
- "Deputy Sheriff James W. Bell". The Officer Down Memorial Page (ODMP). Archived from the original on October 23, 2020. Retrieved August 14, 2020.
- Utley 1989, p. 181.
- Wallis 2007, pp. 243–244.
- "Deputy U.S. Marshal Robert Olinger". The Officer Down Memorial Page (ODMP). Archived from the original on August 4, 2020. Retrieved August 14, 2020.
- Jacobsen 1994, p. 232.
- Utley 1989, p. 188.
- Boardman, Mark (May 24, 2011). "The Holy Grail for Sale – The Billy the Kid tintype is on the auction block, and it might just clear half a million". True West Magazine. Archived from the original on March 5, 2016. Retrieved February 10, 2016.
- Villagran, Lauren (December 1, 2013). "Is this Billy the Kid?". Albuquerque Journal – Las Cruces Bureau. Archived from the original on December 15, 2016. Retrieved February 6, 2016.
- Wallis 2007, pp. 245–246.
- Wallis 2007, p. 247.
- Frederick Nolan (2014). The Billy the Kid Reader. University of Oklahoma Press. p. 86. ISBN 978-0806182544. Archived from the original on July 9, 2021. Retrieved July 4, 2021.
- Janofsky, Michael (June 5, 2003). "122 Years Later, Lawmen Are Still Chasing Billy the Kid". The New York Times. p. 24. Archived from the original on January 25, 2019. Retrieved January 25, 2019.
- "The Death Of Billy The Kid, 1881". Eyewitness to History/Ibis Communications. Archived from the original on February 19, 2020. Retrieved February 18, 2020.
- Klein, Christopher (February 27, 2015). "Historian Seeks Death Certificate to End Billy the Kid Rumors". History.com. Archived from the original on March 4, 2016. Retrieved February 10, 2016.
- Rose, Elizabeth R. (December 31, 2012), "Ft. Sumner New Mexico: Where Billy The Kid met his demise", Santa Fe Examiner
- Bell, Bob Boze; Gardner, Mark Lee (August 12, 2014). "A Shot in the Dark: Billy the Kid vs Pat Garrett". True West Magazine. Archived from the original on February 16, 2016. Retrieved February 10, 2016.
- "Santa Fe Daily New Mexican Newspaper", Santa Fe Daily New Mexican, p. 4, July 21, 1881
- (New Mexico Territorial Legislature July 18, 1882).
- Utley 1989, pp. 198–199.
- Utley 1989, p. 199.
- LeMay, John and Stahl, Robert J. (2020). The Man Who Invented Billy the Kid: The Authentic Life of Ash Upson. Roswell, NM: Bicep Books. pp. 127–133. ISBN 978-1953221919.
- Wallis 2007, p. xiv.
- "Field & Stream". Field & Stream 2007–08: 106–. July 1981. ISSN 8755-8599. Archived from the original on November 1, 2017. Retrieved July 20, 2017.
- Texas Department of Transportation, Texas State Travel Guide, 2008, pp. 200–201
- Miller, Michael E. (July 21, 2015). "One man's quest to bury the Wild West mystery of Billy the Kid's death". The Washington Post. Archived from the original on December 23, 2015. Retrieved December 25, 2015.
A family Bible put his age in 1881 at just 2 years old: far too young for even a criminal nicknamed 'the Kid'.
- Banks, Leo W. "A New Billy the Kid?". Tucson Weekly. Archived from the original on June 16, 2009. Retrieved August 4, 2008.
- Associated Press (October 24, 2006) 2 won't face charges in Billy the Kid quest Archived February 1, 2016, at the Wayback Machine, Deseret News. Retrieved August 29, 2008.
- Burns, James T. (April 28, 2012). "Billy the Kid and New Mexico Open Records Law". Albuquerque Business Law. Archived from the original on December 26, 2015. Retrieved December 25, 2015.
- Miller, Patrick (March 18, 2004). "Shootout over Billy the Kid". The Christian Science Monitor. Archived from the original on December 22, 2015. Retrieved December 13, 2015.
- Villagran, Lauren (May 20, 2014). "Award ends suit over Billy the Kid records". Albuquerque Journal. Archived from the original on August 19, 2017. Retrieved December 25, 2015.
- Associated Press (August 28, 2008) Lawsuit seeks DNA evidence for 1881 death of Billy the Kid Archived August 19, 2017, at the Wayback Machine, Fox News Channel. Retrieved August 29, 2008.
- "Billy the Kid quest evolves into records fight". pressreader.com. Archived from the original on August 19, 2017. Retrieved August 18, 2017.
- Constable, Anne (July 17, 2015). "Historian asks state's high court to help set record straight on Billy the Kid's death". The Santa Fe New Mexican. Archived from the original on November 8, 2020. Retrieved December 14, 2015.
- "Flea market photo 'shows Billy the Kid'". BBC News. November 22, 2017. Archived from the original on November 22, 2017. Retrieved November 23, 2017.
- Tripp, Leslie (June 26, 2011). "Billy the Kid photograph fetches $2.3 million at auction". CNN. Archived from the original on July 6, 2015. Retrieved July 4, 2015.
- "Billy the Kid portrait fetches $2.3m at Denver auction". BBC News US & Canada. June 26, 2011. Archived from the original on February 29, 2016. Retrieved January 26, 2016.
- Adetunji, Jo (June 26, 2011). "Billy the Kid photograph sold at auction in Colorado for $2.3m". The Guardian. Archived from the original on March 5, 2016. Retrieved December 28, 2015.
- Horan, James D. and Sann, Paul. Pictorial History of the Wild West, New York: Crown Publishers, Inc., 1954 – p. 57.
- Mayes, Ian (March 3, 2001). "I kid you not". The Guardian. Archived from the original on March 12, 2014. Retrieved June 19, 2009.
- Gardner, Mark Lee: To Hell on a Fast Horse: The Untold Story of Billy the Kid and Pat Garrett (2011), pp. 91, 277
- Nolan 1998, p. 29.
- Wallis 2007, p. 83.
- Goode, Stephen (June 10, 2007). "The fact and fiction of America's outlaw". The Washington Times. Archived from the original on June 20, 2009. Retrieved December 25, 2015.
Billy loved to sing and had a good voice, those who knew him claimed ... He was ambidextrous and wrote well with both hands.
- Constable, Anne (August 24, 2015). "Billy the Kid: A fan of croquet?". The New Mexican. Archived from the original on May 8, 2020. Retrieved December 10, 2017.
- "Billy the Kid Experts Weigh in on the Croquet Photo". True West Magazine. October 14, 2015. Archived from the original on March 1, 2016. Retrieved February 3, 2016.
- Constable, Anne (August 24, 2015). "Billy the Kid: A fan of croquet?". Santa Fe New Mexican. Archived from the original on May 8, 2020. Retrieved September 23, 2015.
- Guijarro, Randy (October 18, 2015). "Billy the Kid: New Evidence. Found Photograph". National Geographic. Archived from the original on December 14, 2017. Retrieved December 10, 2017.
- "Billy the Kid: New Evidence". National Geographic. October 18, 2015. Archived from the original on December 11, 2017. Retrieved December 10, 2017.
- Booker, Brakkton (October 15, 2015). "$2 Photo Found at Junk Store Has Billy The Kid in It, Could Be Worth $5M". NPR. Archived from the original on January 26, 2016. Retrieved January 25, 2016.
- Carroll, Rory (October 19, 2015). "Man who discovered rare Billy the Kid photo: 'The hunt is a really grand thing'". The Guardian. Archived from the original on October 28, 2015. Retrieved October 27, 2015.
- "No pardon for Billy the Kid". CNN. December 31, 2010. Archived from the original on November 9, 2012. Retrieved December 31, 2010.
- "An Outlaw by Any Name: Billy the Kid". The New York Times. July 14, 2016. Archived from the original on January 29, 2017.
- Simmons 2006, pp. 161–163.
- Simmons 2006, pp. 164–165.
- "Billy the Kid's Elusive Tombstone / Old Fort Sumner and Billy the Kid's Grave". Cemeteries-of-tx.com. Archived from the original on May 27, 2016. Retrieved February 9, 2016.
- Lohr, David (June 30, 2012). "'Billy the Kid' tombstone in New Mexico vandalized". The Huffington Post. Archived from the original on July 4, 2012. Retrieved March 21, 2013.
- Adams, Ramon F. (1960). A Fitting Death for Billy the Kid. Norman: University of Oklahoma Press. OCLC 8937525.
- Boomhower, Ray E. (2005). The Sword and the Pen. Indianapolis: Indiana Historical Society Press. p. 103. ISBN 0-87195-185-1.
- Burns, Walter (2014). The Saga of Billy the Kid: The Thrilling Life of America's Original Outlaw. Garden City, New York: Skyhorse Publishing. ISBN 978-1-63220-112-6. OCLC 894170041. Retrieved May 12, 2016.
- Coe, George W. (1934). Frontier Fighter: The Autobiography of George W. Coe Who Fought and Rode with Billy the Kid, as Related to Nan Hillary Harrison. Boston: Houghton Mifflin. OCLC 692143776. Archived from the original on June 13, 2019. Retrieved August 29, 2016.
- Cooper, Gale (2017). The Lost Pardon of Billy the Kid: An Analysis Factoring in the Santa Fe Ring, Governor Lew Wallace's Dilemma, and a Territory in Rebellion. Albuquerque, New Mexico: Gelcour Books. ISBN 978-0986070723.
- DeMattos, Jack (November 1978). "The Search for Billy the Kid's Roots". Real West. No. 160. Real West.
- DeMattos, Jack (January 1980). "The Search for Billy the Kid's Roots – Is Over!". Real West. No. 167. Real West.
- DeMattos, Jack (August 1983). "Gunfighters of the Real West: Henry McCarty, Alias 'Billy the Kid'". Real West. No. 192. Real West.
- Dworkin, Mark J. (2015). American Mythmaker: Walter Noble Burns and the Legends of Billy the Kid, Wyatt Earp, and Joaquín Murrieta. Norman: University of Oklahoma Press. ISBN 978-0-8061-4902-8. Archived from the original on June 12, 2019. Retrieved June 13, 2016.
- Dykes, Jefferson (1952). Billy the Kid: The Bibliography of a Legend. Albuquerque: The University of New Mexico Press. Archived from the original on June 9, 2019. Retrieved August 29, 2016.
- Earle, James H. (1988). The Capture of Billy the Kid. College Station, Texas: Creative Publishing Co. ISBN 0-932702-44-9. OCLC 18052460.
- Edwards, Harold L. (1995). Goodbye Billy the Kid. College Station, Texas: Creative Publishing Co. ISBN 1-57208-000-0. OCLC 33335740.
- Fable, Edmund Jr. (1980) . The True Life of Billy the Kid, The Noted New Mexican Outlaw. College Station, Texas: Creative Publishing Co. ISBN 0-932702-11-2. OCLC 6487191.
- Fulton, Maurice Garland (1968). Robert N. Nullin (ed.). History of the Lincoln County War. Tucson: University of Arizona Press. OCLC 437868.
- Gardner, Mark Lee (2010). To Hell on a Fast Horse: Billy the Kid, Pat Garrett, and the Epic Chase to Justice in the Old West. New York: William Morrow. ISBN 978-0-06-136827-1. OCLC 419859633.
- Garrett, Pat F. (1882). The Authentic Life of Billy, the Kid (1st ed.). Santa Fe: New Mexican Printing and Publishing Co. OCLC 748293298.
- Hough, Emerson (September 1901). "Billy the Kid: The True Story of a Western 'Bad Man'". Everybody's Magazine. New York: The Ridgeway Company. Archived from the original on September 2, 2021. Retrieved August 28, 2016.
- Hunt, Frazier (2009) . The Tragic Days of Billy the Kid. Santa Fe, New Mexico: Sunstone Press. ISBN 978-0-86534-717-5. OCLC 316327276. Archived from the original on December 23, 2016. Retrieved November 21, 2017.
- Jacobsen, Joel (1994). Such Men as Billy the Kid: The Lincoln County War Reconsidered. Lincoln: University of Nebraska Press. ISBN 978-0-8032-2576-3. OCLC 29429457.
- Keleher, William Aloysius (2007) . Violence in Lincoln County 1869–1881. Santa Fe, New Mexico: Sunstone Press. ISBN 978-0-86534-622-2. OCLC 182573474.
- Klasner, Lily; Chisum, John Simpson; Ball, Eve (1972). My Girlhood Among Outlaws. Tucson: University of Arizona Press. ISBN 978-0-8165-0354-4. OCLC 166482848.
- Koop, Waldo E. (1964). "Billy the Kid: The Trail of a Kansas Legend". Kansas City Posse of Westerners. IX (3).
- Lifson, Amy (2009). "Ben-Hur". Humanities. Vol. 30, no. 6. Washington, D.C.: National Endowment for the Humanities. Archived from the original on March 5, 2012. Retrieved August 27, 2014.
- McCubbin, Robert G. (May 2007). "The Many Faces of Billy the Kid". True West. True West.
- Metz, Leon C. (August 1983). "My Search for Pat Garrett and Billy the Kid". True West. True West.
- Metz, Leon C. (1983) . Pat Garrett: The Story of a Western Lawman (reprint, revised ed.). Norman: University of Oklahoma Press. ISBN 978-0-8061-1838-3. OCLC 18722891.
- Nolan, Frederick W. (2009a). The Life and Death of John Henry Tunstall. Santa Fe, New Mexico: Sunstone Press. ISBN 978-0-86534-722-9. OCLC 440562959.
- Nolan, Frederick W. (2009) . The Lincoln County War: A Documentary History (revised ed.). Santa Fe, New Mexico: Sunstone Press. ISBN 978-0-86534-721-2. OCLC 319064671. Archived from the original on June 11, 2019. Retrieved May 12, 2016.
- Nolan, Frederick W. (1992). The Lincoln County War: A Documentary History. Norman: University of Oklahoma Press.
- Nolan, Frederick W. (June 2003). "The Hunting of Billy the Kid". Wild West. Wild West.
- Nolan, Frederick W. (1998). The West of Billy the Kid. Norman: University of Oklahoma Press. ISBN 0-8061-3082-2.
- Nolan, Frederick W. (July 2000). "The Private Life of Billy the Kid". True West. True West.
- Nolan, Frederick W. (2007). The Billy the Kid Reader. Norman: University of Oklahoma Press. ISBN 978-0-8061-8446-3.
- Otero, Miguel (2006) . The Real Billy the Kid, With New Light on the Lincoln County War. New York: Sunstone Press. ISBN 978-1-61139-100-8.
- Poe, John William (2006) . The Death of Billy the Kid (reprint ed.). Santa Fe: Sunstone Press Company. ISBN 978-0-86534-532-4.
- Radbourne, Allan; Rasch, Phillip J. (August 1985). "The Story of 'Windy' Cahill". Real West. No. 204. Real West.
- Rasch, Philip J.; Mullin, Robert N. (1953). "New Light on the Legend of Billy the Kid". New Mexico Folklore Record 7.
- Rasch, Philip J. (1954). "Dim Trails: The Pursuit of the McCarty Family". New Mexico Folklore Record 8.
- Rasch, Philip J. (1955). "The Twenty-One Men He Put Bullets Through". New Mexico Folklore Record 9.
- Rasch, Philip J. (January 1969). "A Second Look at the Blazer's Mill Affair". Frontier Times.
- Rasch, Philip J. (November 1987). "The Trials of Billy the Kid". Real West. No. 216. Real West.
- Rasch, Philip J. (1995). Trailing Billy the Kid. Stillwater, Oklahoma: Western Publications. ISBN 978-0-935269-19-2.
- Rasch, Philip J. (1997). Gunsmoke in Lincoln County. Stillwater, Oklahoma: Western Publications. ISBN 978-0-935269-24-6.
- Rasch, Philip J. (1998). Warriors of Lincoln County. Stillwater, Oklahoma: Western Publications. ISBN 978-0-935269-26-0.
- Rickards, Colin W. (1974). "The Gunfight at Blazer's Mill". Southwestern Studies Monograph No. 40. El Paso, Texas: Western Press.
- Simmons, Mark (2006). Stalking Billy the Kid: Brief Sketches of a Short Life. Sunstone Press. ISBN 0-86534-525-2.
- Turk, David S. (February 2007). "Billy the Kid and the U.S. Marshals Service". Wild West Magazine. Archived from the original on August 17, 2018. Retrieved November 2, 2017.
- Tuska, Jon (1983). Billy the Kid: A Handbook. Lincoln: University of Nebraska Press. ISBN 0-8032-9406-9.
- Utley, Robert M. (1987). High Noon in Lincoln: Violence on the Western Frontier. Albuquerque: University of New Mexico Press. ISBN 978-0-8263-1201-3. OCLC 15629305. Retrieved May 12, 2016.
- Utley, Robert M. (1989). Billy the Kid: A Short and Violent Life. Lincoln: University of Nebraska Press. ISBN 978-0-8032-9558-2. OCLC 37868038. Archived from the original on June 11, 2019. Retrieved May 12, 2016.
- Wallis, Michael (2007). Billy the Kid: The Endless Ride. New York: W.W. Norton & Co. ISBN 978-0-393-06068-3. OCLC 77270750. Retrieved November 21, 2017.
- Billy the Kid Territory – guide by New Mexico Tourism Department
- Letter, 15 March 1879, Lew Wallace to W. H. Bonney, at the Indiana Historical Society, Indianapolis
- Letter, 20 March 1879, W. H. Bonney to Lew Wallace, at the Indiana Historical Society, Indianapolis