Bartlett Sisters 
N.p. [probably U.S.]: Unpublished, 1932. Original photographs. Unbound photographs. Two sepia-toned photographs showing nine women posing in 19th-century dress in a formal parlor. They are grouped differently in each photo. One is costumed as a man. "Bartlett Sisters 1932" is written in ink in the lower right of each photo. Inserted in original display folder, which has come apart. Fine. Item #30487
Your guess is as good as ours as to the dress-up occasion. The photo is similar to a 1916 portrait of the Fragment Society of Boston (a women's service club) in the Schlesinger Library. This is the third photo here.
Richly printed on semi-matte lightweight card stock. No photographer's name or paper manufacturer given. Each, ca. 7 x 5 inches. Can be sent outside the US for less than the default shipping rate.