9 X 6 7/8 in. albumen photograph on 15 5/8 x 11 7/8 in. cardstock mount (square field of discoloration surrounding image likely from previous mat, some spotting and toning, light wear to mount edges and corners). Mount recto features negative and positive credit to Pywell and Gardner, copyright information, title, date, and plate number. Image published as Plate 2 in Gardner's Photographic Sketch Book of the Civil War.

Located near the depot of the Orange and Alexandria Railroad, the structure featured here was used to confine enslaved persons who were to be sold at auction.