Handwritten number in white ink, probably by Antoin Sevruguin, reads "299". The same number in the same location appears on a print of the same image held in the Myron Bement Smith Collection of Antoin Sevruguin Photographs, located in the Freer Gallery of Art and Arthur M. Sackler Gallery Archives.
A glass negative of this image is in the Myron Bement Smith Collection: Antoin Sevruguin Photographs. Freer Gallery of Art and Arthur M. Sackler Gallery Archives. Smithsonian Institution, Washington D.C. Gift of Katherine Dennis Smith, 1973-1985. Reference: FSA A.4 2.12.GN.37.08