No number visible on recto. Titled on verso in what may be the hand of Antoin Sevrugian. The photograph has a description in French on verso that states that the image is of a public prayer for rain.
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. Museum number FSA_A.4_2.12.GN.53.01. Titled: "Group Prayer in the Courtyard of a Mosque".
Ghasem Safi, Aksha-i Ghadimi-i Iran, Rijal, Manazir, Bana-ha, va Muhit-i Ijtima'i ("Historical Photographs of Iran: Dignitariesm, Spectacles, Architecture, and Social Environment"), Tehran: Intisharat va Chap-i Danishgah-i Tehran, 1989, p:228 & p:271