Partly-printed contract, one page, 15 x 10, May 1, 1867. Uncommon document by which Doubleday, as "The Commanding Officer of the Seventeenth Regiment of U.S. Infantry," appoints John McKenah as "Corporal in Company C of the Seventeenth Regiment of U.S. Infantry in the service of the United States." Crisply signed at the conclusion by Lt. Col. Doubleday and countersigned by the regiment's acting adjutant. In very good to fine condition, with intersecting folds, creasing, and minor staining. Accompanied by an engraved portrait bearing a facsimile signature. Pre-certified PSA/DNA.