Lawyer, civil engineer, and Union general (1810–1875). Original 2.5 x 4 carte-de-visite portrait of Roberts in uniform by Henry Ulke of Washington, signed at the bottom in black ink, “Truly yours, B. S. Roberts, Brig. Gen. Vols.” In fine condition, with mild soiling and a trivially clipped upper right corner. RR Auction COA.