John D. Henderson
He was born in Pennsylvania but moved to the Kansas Territory and became a leading advocate of slavery there. He was the proprietor and editor of the Leavenworth Journal. He was elected Chairman of the Central Committee of the pro-slavery National Democratic Party of Kansas, but later was accused of vote fraud.
In 1859, Henderson built a ranch, trading post, and hotel on Henderson Island in the South Platte River in Arapaho County, Kansas Territory. Henderson sold meat and provisions to gold seekers on their way up the South Platte River Trail to the gold fields during the Pike's Peak Gold Rush. Henderson Island was the first permanent settlement in the South Platte River Valley between Fort Saint Vrain in the Nebraska Territory and the Cherry Creek Diggings in the Kansas Territory. He returned to eastern Kansas and fought for the Union in the American Civil War.
In Colorado, Henderson bought a chain of gold mines; on a visit to Colorado he and some eighteen others were slaughtered by a group of Osage Indians for crossing the Osage territory with loaded weapons.
- "Adams County, Colorado: Forgotten Past of Adams County, Vol. II". COGenWeb Project. September 18, 2011. Retrieved May 30, 2013.
- Gihon, John H. (1857). "Geary and Kansas: Governor Geary's Administration in Kansas". Kansas Collection Books. Retrieved May 30, 2013.
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