lower left on stone: P.T. LVII; lower left in graphite: Preludes to Finland; lower center in graphite: 40 prints; lower right in graphite: Prentiss Taylor February 1940
- Rose, Ingrid, and Roderick S. Quiroz.. The Lithographs of Prentiss Taylor: A Catalogue Raisonné. Bronx, NY: Fordham University Press, 1996, p. 93, no. 57.