A. Haskell, The Sculptor Speaks, Jacob Epstein to Arnold Haskell A Series of Conversations on Art, London, 1931, p. 177, dated 1920.
R. Buckle, Jacob Epstein Sculptor, London, 1963, p. 102, no. 156, another cast illustrated.
E. Silber, The Sculpture of Epstein, Oxford, 1986, p. 145, no. 101, another cast illustrated.