Union general (1827-1894) who fought at Gettysburg and accompanied Sherman on his March to the Sea. Uncommon 2.5 x 3.75 photo of Slocum in uniform, published by Lazier of Syracuse, signed in ink, "Yours truly, H. W. Slocum." In very good to fine condition, with trimmed edges, a small stain, a small emulsion tear to the top edge, and old mounting residue on the back. Encapsulated in a PSA/DNA authentication holder.