3 1/2" X 7" stereograph image with caption on reverse: 'No.85. Interior view of ginning mills ginning sea island cotton, on Alex. Knox's Plantations, Mt. Pleasant, near Charleston, S.C.' Handwritten on reverse: 'The old man up by the window. OJS. Mch 26, 1875.' Pictured are two African-American men standing behind machinery with wheel cranks, out of which light colored fibers are flowing.