Guanahani is an island in the Bahamas that was the first land in the New World sighted and visited by Christopher Columbus' first voyage, on October 12, 1492. It is not known precisely which island it was. Guanahani is the native Taíno name; Columbus called it San Salvador.
Primary sources 
Letter of Columbus 
Upon his return to Spain in the spring of 1493, Columbus wrote a letter to Luis de Santangel, one of his patrons at the Spanish court. The letter was printed widely and translated into many languages, spreading the news of the discovery throughout Europe. In the letter, Columbus mentions Guanahani as the name of the first island he discovered, but provides no other details. Nevertheless, this single mention in a widely printed letter would have been enough to make the name Guanahani widely known at an early date.
Map of Juan de la Cosa 
Juan de la Cosa was owner and master of the Santa María, and as such sailed with Columbus on the first voyage. He was also a cartographer, and in 1500 de la Cosa drew a map of the world which is widely known as the earliest European map showing the New World. The Caribbean portion of the map shows Cuba and Hispaniola clearly, and a much more confused rendering of the Bahamas. Nevertheless, Guanahani is drawn in the Bahamas in a form that appears to show a group of islets rather than a single island, lying due north of the Windward Passage between Cuba and Haiti, but also towards the northern end of the Bahamas islands chain.
The so-called log of Columbus, more properly referred to as the Diario, is an abstraction made by Bartolomé de las Casas, a Spanish monk and friend of the Columbus family, probably sometime in the 1540s.
When Columbus returned to Spain after the first voyage, he reported to the royal court at Barcelona and presented his original log to the Spanish Sovereigns. Queen Isabel ordered that the log be copied. The original soon disappeared, but the so-called Barcelona copy was returned to Columbus prior to his second voyage and was in his possession at the time of his death in 1506. It then passed to his son Fernando and remained in his vast library for many years. At some point, Las Casas got his hands on the Barcelona copy and made the abstraction we today call the Diario. Although most of the Diario is written in the third-person of Las Casas, nearly all of that portion dealing with Columbus's movements in the Bahamas is in the first person of Columbus himself, and is (according to Las Casas) a direct quote from the Barcelona copy. The Barcelona copy disappeared late in the 16th century, but Las Casas' Diario was discovered intact in 1795 by Ferdinand de Navarette, and published 30 years later.
The Diario remains our most authoritative and detailed account of Columbus's movements and activities on the first voyage.
Biography by Fernando Colón 
In 1571, a biography of Christopher Columbus, written in Italian, was published in Venice. The book was a translation of a Spanish manuscript written by Columbus's second son, Fernando Colón, between 1537 and 1539. The Spanish manuscript eventually was translated into Italian and published by Alfonso Ulloa, a Spaniard making his living in Venice as a professional translator.
It is clear from the context that Fernando must have been working from the Barcelona copy when he wrote the first-voyage portion of his biography, as many details in the biography agree precisely with the Diario. In that sense, the primary utility of the biography is as a validity check on the Diario, a test which vindicates Las Casas in many respects.
However, there are a few descriptions in the biography that are not already in the Diario. Most importantly, the biography asserts that Guanahani was fifteen leagues (60 miles) long, which seems contrary to Columbus's implication in the Diario that he had seen the entire island on a single day's boat trip.
Trans-Atlantic track 
The first way to locate Guanahani is to follow the distances and directions Columbus gave in his log. This procedure is difficult because of the uncertainties in knowing the length of Columbus's league, the speed and direction of ocean currents, and the exact direction his magnetic compass would have pointed in 1492.
John McElroy was one of the first to attempt this in 1941, using a speculative magnetic chart for the year 1500 and currents from pilot charts. His vast overrun in distance was corrected by a fudge factor, leaving his endpoint in the vicinity of Watlings Island. This result was substantially confirmed by Doug Peck's sailing voyage of 1991.
In 1992, Goldsmith and Richardson used vector average currents (rather than prevailing currents) along with an updated magnetic field, and found a track that ended in the vicinity of Grand Turk Island.
In 2004, Keith Pickering applied magnetic declinations from a more modern source and found a track that ended in the vicinity of the Plana Cays.
Light seen on the evening preceding the discovery 
At 10 p.m. on October 11, Columbus saw a light "like a small wax candle that rose and lifted up". He pointed it out to other people on board, some of whom were able to see the light, while others did not. The actual landfall was about 35 miles from the location Columbus saw the light, so if taken that the light was from a ground-based source, then it could not have been from Guanahani, but must have been from another island farther east. For the Plana Cays theory, the light would have been on Mayaguana. For Conception, it could have been on Cat Island, Watling/San Salvador or Rum Cay. For Caicos it could have been on Grand Turk. For Cat Island it could have been Watling/San Salvador and for Lignum Vitae Cay it could have been Eleuthera Island. The Watlings, Grand Turk, and Egg Island theories have no ready explanation.
Description of Guanahani 
Columbus calls the island "very flat and with very green trees", which is true for all of the proposed islands. His next statement is more problematic. He says Guanahani has "muchas aguas y una laguna en medio muy grande" – many waters and a laguna in the middle (or "in between") very big. The word laguna creates many problems. It is uncertain whether it means lagoon or pond. In any case, most of the proposed islands have either a lagoon or pond; only East Caicos lacks one.
On October 14, Columbus made a boat trip to "the other part, which was the eastern part" of Guanahani. Therefore he went the length of the island in a North-northeast direction. This is only possible at Plana Cays, Conception and Egg, and to a very minor extent at Samana Cay. Columbus noticed a reef that completely surrounded the island. All proposed islands have a reef, but the ones on Cat and Watlings do not completely surround the island. Between the reef and the island was a harbor "large enough to store all ships of Christendom." This could easily have been an exaggeration. The harbor on Egg is definitely too small, although it is fairly appropriate for the impressive harbor at the neighboring islet of Royal Island, which could have been considered part of the same larger island he named "San Salvador" (the other "part, which is the eastern part"). Columbus went on land and saw "a piece of land, that looked like an island, but actually wasn't one." This is difficult to track, because it may have become a real island in the past 500 years.
Island or islands 
One question in dispute is whether Guanahani was one island or more than one. Evidence is said to be inconclusive. Columbus never says specifically that Guanahani consisted of more than one island, something which is surely worth noting. But he does say that Guanahani had "another part, which is the eastern part"; and to explore that eastern part, he used a boat rather than walking, which may be significant.
On reproductions of the map of Juan de la Cosa, who was with Columbus, Guanahani looks to some researchers like a string of small islands.
Inter-island track 
||This section may contain original research. (June 2012)|
Besides the transatlantic track, the other important method for determining the location of Guanahani is the inter-island track, which can be traced either forward (from Guanahani to Cuba) or backward (from Cuba to Guanahani). Given the numerous descriptions of courses, distances, and directions in the log, this method seems more likely to pinpoint the location, and has been by far the most frequently used method of historians.
It was common practice among 20th century historians to refer to the various Bahamian islands visited by Columbus by Roman numerals to avoid confusion: Island I being Guanahani, Island II being the second island visited by Columbus (which he named Santa María de la Concepción); followed by Island III (named Fernandina by Columbus) and Island IV (called Samoete by the Indians and renamed Isabela by Columbus).
Following these four islands, Columbus next visited a string of seven or more islands in a line running north-south (which historians generally agree must be the modern Ragged Island Range) before landing on the north coast of Cuba. A successful inter-island track must therefore navigate from Guanahani to the Ragged Islands in a way that fits the descriptions of the log without serious infidelity. Strictly speaking this is impossible, as there are a few places where the log seems to contradict itself.
Island II 
Leaving Guanahani late on October 14, Columbus said "I saw so many islands I did not know how to decide which one I would go to first". Aiming for the largest, he estimated its distance by eye at five leagues, while other islands were both nearer and farther than that.
He arrived at Island II around noon, delayed by a contrary marea (usually translated as "tide", although "breeze" is possible), re-estimating the distance as seven leagues rather than five. Island II had a coastline facing Guanahani that ran north-south for five leagues, and another coastline ("which I followed", says Columbus) that ran east-west for more than ten leagues.
At this point comes a contentious passage in the log: "And since from this island I saw another larger one to the west, I spread sail to go forward all that day until night, because [otherwise] I would not have been able to reach the western cape of the island". From this it is unclear whether the "western cape" at which Columbus anchored that night was on the island with the five- and ten-league coastlines, or the larger island to the west; in other words, it is unclear whether Columbus was adjacent to one or two islands on October 15. Those who prefer the two-island interpretation call these Island IIa and Island IIb.
Island III 
The log gives two descriptions of the sail from Island II to Island III on October 16: in the first version, Columbus leaves at 10 AM and sails nine leagues east-west to reach Island III; in the second version, Columbus leaves at noon and sails eight leagues "almost east-west" to reach Island III.
Columbus also gives somewhat contradictory information on the size of Island III, saying at first (before actually exploring the island) that it "may well be" more than 28 leagues long; but later saying only that "I saw quite 20 leagues of it but it did not end there."
But Columbus does give quite detailed information on the coastline of Island III, more so than any other island he visited. On the evening of October 16, he arrived at a cape where the coastlines ran NNW and SSW (though some scholars see a possible transcription error here). The following morning (October 17) he followed the coast NNW, and when he was two leagues distant from the end (or "the cape") of the island he found a "wonderful harbor" with a small island in its mouth forming two narrow entrances. Going into the harbor with boats he found it too shallow for use and put the boats ashore for water instead. Leaving the harbor after two hours, he then sailed northwest (rather than the previous NNW) "so far that I viewed all that part of the island as far as the coast that runs east-west".
Columbus ran into foul weather on the night of October 17–18 and gained sea room to avoid running onto a lee shore. He returned to Island III on the 18th, but the log does not specify where on the island he anchored that night. The following morning, October 19, he split his fleet to search for the island of Samoete that his kidnapped Indian guides had told him about.
Island IV 
Leaving his Island III anchorage at dawn, Columbus sent Niña SSE and Santa Maria SE, while Pinta was sent "east and southeast" (contrary to the ESE mentioned in some sources). Thus the ships were able to sweep a large area of ocean in search of the island whose position was only vaguely known. The Santa Maria herself raised the island before 9 AM, and signalling the other ships to rejoin, Columbus reached Island IV before noon, arriving at the northern point. Columbus describes this point as being surrounded by a reef, with a small island nearby.
Columbus's descriptions of Island IV are, at best, confusing. He describes Island IV being "on an east-west course" from Island III (which contradicts his previous description of the fleet's movements in the search), and he also asserts that from the northern point the coast ran west for 12 leagues, to its western cape, Cabo Hermoso. The direction of this coastline running west contradicts both Columbus's own arrival at the island (since he arrived at the north point by sailing east, and did not arrive at Cabo Hermoso first) and his later description of his departure from this northern end of Island IV (as he departed sailing SSW and yet did not run aground).
From Cabo Hermoso, Columbus described a "great bight" to the northeast. Further confusing the issue, Columbus then says that he believes Cabo Hermoso is on a separate island from Samoete. The following morning (October 20) he tried to enter the bight in order to circumnavigate the island. That attempt soon proved futile because it was too shallow, and Columbus reversed course and returned to the northern end, awaiting the arrival of the King which his kidnapped Indian guides had told him about.
After two days of fruitless waiting for the King and another day becalmed, Columbus departed from the northern end of Island IV at midnight on October 24, setting his sights on Cuba, the large island to the south he had been told about. He sailed WSW until dawn on the 24th, then was becalmed again until noon, making scant progress in the afternoon. At some point he fixed his position at seven leagues southeast of Cape Verde, which he describes as being "in the western part of the southern part" of Island III. From that point he made two leagues on a doubtful course under a rising wind; then, the morning of October 25, he made five leagues WSW and another 11 leagues west when they sighted the Ragged Islands, which he called the Islas de Arena (Sand Islands) running north-south at a distance of five leagues.
Prominent candidates 
- Modern San Salvador Island; it was known since the 17th century as Watling Island, but renamed in 1925 after historians identified it as Guanahani. This hypothesis was first proposed by Juan Bautista Muñoz (1793). It was resurrected by A. B. Becher (1856) and forwarded strongly by James Murdock (1884). Notable defenders of the theory include the influential historians Richard Henry Major (1871) and Samuel Eliot Morison (1942). It remains widely accepted as the most probable candidate today.
- Grand Turk Island, was first proposed by Martín Fernandez de Navarrete in 1825, but soon fell out of favor until it was resurrected by Robert Power in 1924.
- Samana Cay, first proposed in 1880 by Gustavus V. Fox, a US Navy captain. Fox's theory was little known until revived in a 1986 issue of National Geographic Magazine.
Other suggested candidates 
- Cat Island, was long believed to be Guanahani and identified as such on many nautical charts from the 18th Century. In light of the competing new theories of Muñoz and Navarrete, Washington Irving (1828), with the asssistance of Alexander Slidell Mackenzie, set out the case for Cat island, and was supported by the weight of Alexander von Humboldt (1837). The hypothesis lost traction after the publication of Bartolomé de las Casas' abstract of Columbus's on-board journal (1875–1876), which argued strongly against the identification.
- Conception Island, proposed by R.T. Gould in 1943
- Egg Island, proposed by Arne Molander in 1981
See also 
- McElroy, John W. (1941) The Ocean Navigation of Columbus on His First Voyage. The American Neptune, I 209-240.
- Peck, Douglas T. (1993) Christoforo Colombo, God's Navigator, Columbus, WI: Columbian Publishers.
- Marden, Luis. (1986) The First Landfall of Columbus. National Geographic, 170 (November) 572-577.
- Goldsmith, Roger A. and Philip L. Richardson, (1992). Numerical Simulations of Columbus' Atlantic Crossings. Woods Hole Oceanog. Inst. Tech. Rept., WHOI-92-14, February 1992.
- Pickering, Keith A. The Transatlantic Tracks of Columbus. Society for the History of Discoveries lecture, Cody, Wyoming September 11, 2004
- Dunn & Kelley 8v7-8
- Dunn & Kelley 10r21-22
- Dunn & Kelley 10r23-24
- Dunn & Kelley 10v9-10
- Dunn & Kelley 11r13-14
- Dunn & Kelley 11r38-41
- Dunn & Kelley 12r9-17
- Dunn & Kelley 12v23-13r11
- Dunn & Kelley 12r19-20
- Dunn & Kelley 13r13-14
- Dunn & Kelley 13r11-13
- Dunn & Kelley 14r39-41
- Dunn & Kelley 14v22-31
- Dunn & Kelley 14v36-41
- Dunn & Kelley 15v1
- Dunn & Kelley 17v1-3
- Dunn & Kelley 17v18-25
- Muñoz (1793: p.85-86)
- Becher (1856); Murdock (1884: pp.449-86); for more recent detailed defenses of the Watling hypothesis, see Roukema (1959) and Peck (1993)
- William D. Phillips Jr., 'Columbus, Christopher', in David Buisseret (ed.), The Oxford Companion to World Exploration, (Oxford: Oxford University Press, online edition 2012).
- Navarrete (vol. 1, p.civ-cv)
- R.H. Major (1848: p.liii-liv), initially seemed to support Navarrete's hypothesis of Grand Turk; but he later changed his mind to support Muñoz's Watling hypothesis (Major, 1871: p.171-72).
- Fox (1880)
- See Judge (1986)
- See Pickering's website, "Columbus Landfall Homepage (accessed Feb 26, 2012) for an exposition of his argument.
- Irving (1828: vol. 4, App. XVI, pp.239-71); Humboldt (1837: vol. 3, p.169, see also p.210)
- The original transcript is a holograph found in 1791 of 67 double-sided folios in the handwriting of Bartolomé de Las Casas, who used it to prepare his "Historia de las Indias". Navarrete (1825) had already published a version of it, but omitted some selections. The Las Casas manuscript was published in full in five volumes in 1875-76, it has had many English translations, most notably a combined transcription and translation by Dunn and Kelley The Diario of Christopher Columbus's First Voyage to America, 1492-1493. University of Oklahoma Press. 1989.
- Varnhagen (1864)
- Verhoog's Caicos hypothesis was vigorously supported by the Links (1958) and Fuson (1961)
- Becher, A.B. (1856) The Landfall of Columbus on his First Voyage to America. London: Potter. online
- Dunn, Oliver, and James E. Kelley, Jr. (1989). The Diario of Christopher Columbus's First Voyage to America, 1492-1493. Norman and London: University of Oklahoma Press.
- Fox, Gustavus V. (1880) "An Attempt to solve the Problem of the First Landing Place of Columbus in the New World", Report of the Superintendant of the US Coast and Geodetic Survey. Appendix No. 18, June 1880). Washington, DC: Government Printing office. offprint
- Fuson, Robert (1961) "Caicos: Site of Columbus's Landfall", Professional Geographer, vol. 13 (2), pp. 65–97.
- Humboldt, Alexander von (1837) Examen critique de l'histoire de la géographie du nouveau continent et des progrès de l'astronomie nautique aux quinzième et seizième siècles, Paris: Gide, vol. 3, p.169ff.
- Irving vol VI, App. 16, p. 238-71
- Irving, Washington (1828) "Appendix XVI: Route of Columbus in his First Voyage", in vol.IV of A History of the Life and Voyages of Christopher Columbus. London: Murray. App. XVI, pp.239-71
- Judge, Joseph (1986) "Our Search for the True Columbus Landfall", National Geographic, vol. 170 (No. 5, November), pp. 566–71.
- Link, E.A. and M.C. Link (1958) A New Theory on Columbus's Voyage through the Bahamas. Washington DC: Smithsonian institution.
- Major, Richard H. (1848) Select Letters of Christopher Columbus, with other original documents relating to his four voyages to the New World. London: Hakluyt. online
- Major, R.H. (1871) "The Landfall of Christopher Columbus", Report of the Fortieth Meeting of the British Association for the Advancement of Science - Notices and Abstracts, London: Murray. p.171-72
- Molander, Arne (1983) "A New Approach to the Columbus landfall", Terrae Icognitae, vol. 15, pp. 113–149.
- Morison, Samuel Eliot (1942) Admiral of the Ocean Sea. 2 vols. Boston: Little, Brown & Co.
- Murdock, J.B. (1884) "The Cruise of Columbus in the Bahamas, 1492", Proceedings of the US Naval Institute, Vol 10, pp.449-86.
- Navarrete, Martín Fernández de (1825–37) Colección de los viages y descubrimientos que hicieron por mar los españoles desde fines del siglo XV: con varios documentos inéditos concernientes á la historia de la marina castellana y de los establecimientos españoles en Indias, 4 vols., Madrid: Imprensa Real.v.1 (1825), v.2, v.3 (1829)
- Peck, Douglas T. (1993) Christoforo Colombo, God's Navigator, Columbus, WI: Columbian Publishers
- Peck, Douglas T. (post-1996) "The Navigation of Columbus and the Controversy over his landfall island in the New World", New World Explorers, online
- Pickering, Keith (1994) "Plana Cays as the Landfall of Columbus in 1492", Dio, Vol. 4 (1), p..15-32.
- Pickering, Keith (1997, rev. 2010) "The Columbus Landfall Homepage: Just where did Columbus first see the New World?" online
- Roukema, E. (1959) "Columbus Landed on Watlings Island", American Neptune, vol. 19, pp. 79–113.
- Varnhagen, F.A. (1864) "La verdadera Guanahani de Colon", Anales de la universidade de Chile, vol. 26. offprint
- Verhoog, Pieter (1947) "Columbus Landed on Caicos", Proceedings of the U.S. Naval Institute, 80, 1101-1111.