Signature: In graphite lower right: 'John Sloan'
Inscription: Lettered in plate at bottom left in reverse: 'John Sloan 1913'; in graphite below image: '100 proofs/ Prone Nude'
Mrs. Harry Payne Whitney; Donor: Mrs. Harry Payne Whitney
Peter Morse John Sloan Prints A Catalogue Raisonné of the Etchings, Lithographs, and Posters. New Haven and London, 1969, cat. no. 162. ii, p. 185, ill.