The collection comprises a series of 20 letters, 4 photographs and 1 business card. All but one of the letters are written by Caverly to F. G. Riley, also a New York photographer. Letter of August 1, 1918 includes a signed sketch. The collection also includes one letter dated January 24. 1917 from movie director and producer Herbert Brenon to Riley. Correspondence is arranged chronologically. Photographs are in protective sleeves.

Added in 2016 is a film by Caverly called America's Answer. This is available for viewing only in Special Collections or at the National Archives, which holds the original.