David Knox, 1864, October, Mortar Dictator, [Gardner's Photographic Sketch Book of the War. Incidents of the War, pl. 75], Albumen print, Lee Gallery, LL/13912
Timothy H. O'Sullivan, 1865, May, Quarters of Men in Fort Sedgwick, Generally Known as Fort Hell, [Gardner's Photographic Sketch Book of the War. Incidents of the War, pl. 83], Albumen print, Lee Gallery, LL/14038