Born in Tennessee in 1797, Mr. Gehon lived in Kentucky and Illinois during his early years. He operated a trading post in Helena, Arkansas before moving to Dodgeville, Wisconsin. He served as a United States Marshal in Wisconsin. He commanded a militia company in Wisconsin during the Black Hawk War. He later settled in Peru, Iowa, where he managed a store. A Democrat, he served on the Dubuque County Board of Supervisors. He also served as a United States Marshal for Iowa and served in the Iowa Militia as brigadier general in command of the 2nd Brigade. In 1839, Mr. Gehon was elected the delegate from Iowa Territory to the United States House of Representatives, but never took office. The United States Congress extended the term of William W. Chapman to bring the term of office in line with the rest of the United States House of Representatives. In 1843, he was elected to the Iowa Territorial Council, and in 1844, he was a delegate to the first Iowa Constitutional Convention. He was offered command of a company of dragoons raised for the Mexican-American War, but declined because of ill health. He died in Dubuque, Iowa on April 2, 1849.