Edgar Degas 1877-1878 (ca) Les deux danseuses (The two dancers) / Object: Two dancers in a rehearsal room
Drypoint and aquatint British Museum Prints and Drawings, Registration number: 1931,0721.47
See Sue Welsh Reed and Barbara Stern Shapiro, 'Edgar Degas, the painter as printmaker', Boston 1984, cat.33. This was made on a daguerreotype plate, and is one of six located impressions.