Lieutenant in Custer’s 7th Cavalry (1837–1915) who was in command of the pack train and involved in hilltop fighting at the Battle of the Little Bighorn. Manuscript DS, signed “E. G. Mathey,” one page, 8.25 x 7.5, February 9, 1878. Special requisition document confirming receipt of “One (1) Company Description Book, Two (2) sets First Sergeants Chevrons, Six (6) Water Buckets.” Signed at the conclusion in black ink by Mathey as a captain in the 7th Cavalry, and countersigned by Elwell S. Otis as lieutenant colonel. In very good to fine condition, with complete separation to central horizontal fold (repaired with tape to reverse), and a couple small tears to top edge. RR Auction COA.