Union officer who commanded in the Army of the Potomac. Original 3.75 x 5.25 cabinet photo, signed in the lower border in black ink, “D. M. M. Gregg, Brig & Bvt Maj Gen Vols, Comdg 2d Cav Div A of P.” In very good condition, with photo having been separated from the backing (not included), small tear to top edge, and trimmed edges. RR Auction COA.