For more info. on the Whiting family into which Endelin married and the Seventh U.S. Infantry in which he served until his resignation, see Murphy Givens, ed., "Daniel P. Whiting: A Soldier's Life" (Corpus Christi, TX: Nueces Press, 2011) While in the Seventh in Utah, Endelin served with 1st Lieut. Jesse B. Wharton, who married another Whiting daughter (Sue). Wharton, Endelin's brother-in-law, had a severe alcohol problem and was cashiered before the Civil War. During the war, he was arrested and imprisoned as a civilian political prisoner in Old Capitol Prison, where Endelin was later briefly incarcerated at the end of the war. In a bizarre incident at the prison, Wharton was fatally shot by a sentry in 1862.