lower right in plate: John Sloan 37; lower left in graphite: 100 proofs; lower center in graphite: "Better Mousetraps"; lower right in graphite: John Sloan
- Morse, Peter. John Sloan's Prints: A Catalogue Raisonné of the Etchings, Lithographs, and Posters. New Haven and London: Yale University Press, 1969, p. 331, no. 298, ii/ii.