upper center in plate: R.S.A; lower center in graphite: Robert Austin 1925
- Dodgson, Campbell. A Catalogue of Etchings and Engravings by Robert Austin, R.E., 1913-1929. London: Twenty-One Gallery, 1930, no. 60, ii/ii.
- Drawings and Prints by Robert Sargent Austin, with a Complete Catalog of His Prints. London: Fine Art Society, 2001, no. 60.