Confederate general (1823-1914) best remembered for submitting to Grant's famous demand for unconditional surrender at the Battle of Fort Donelson. Scarce 2.25 x 4 carte-de-visite half-length portrait of Simon Bolivar Buckner seated in his military uniform with a saber on his lap, signed in the lower border in ink, “S. B. Buckner, Brig. Gen. C.S.A.” In fine condition. Encapsulated in a PSA/DNA authentication holder.