G. Grappe, Catalogue du Musée Rodin, Paris, 1944, no. 166, p. 58 (marble version illustrated).<br>C. Goldscheider, Rodin, sa vie, son oeuvre, son héritage, Paris 1962, p. 49 (marble version illustrated).<br>A.E. Elsen, Rodin, New York, 1963, p. 62 (another version illustrated p. 63).<br>B. Champigneulle, Rodin, London, 1967, pp. 162-163 & 282, nos. 78-79 (marble version illustrated).<br>R. Descharnes & J.F. Chabrun, Auguste Rodin, Lausanne, 1967, p. 130 (marble version illustrated p. 131).<br>I. Jianou & C. Goldscheider, Rodin, Paris, 1967, p. 100 (marble version illustrated pls. 54-55).<br>L. Goldscheider, Rodin Sculptures, A Critical Study of the Spreckels Collection, London, 1970, pl. 49 (marble version illustrated).<br>J.L. Tancock, The Sculpture of Auguste Rodin, Philadelphia, 1976, pp. 72, 90 & 108 (marble version illustrated p. 77).<br>J. de Caso and P.B. Sanders, Rodin's Sculpture, San Francisco, 1977, pp. 149-152 (another cast illustrated p. 148).<br>N. Barbier, Marbres de Rodin: Collection du Musée, Paris, 1987, p. 184, no. 79 (marble version illustrated p. 185).<br>F.V. Grunfeld, Rodin, A Biography, New York, 1987, pp. 187-90, 221-22, 260, 262, 275-276, 281-282, 342, 373-374, 400, 457 & 577.<br>D. Finn & M. Busco, Rodin and his Contemporaries: The Iris and B. Gerald Cantor Collection, New York, 1991, p. 60 (another cast illustrated).<br>R. Masson & V. Mattiussi, Rodin, Paris, 2004, p. 40 (marble version illustrated p. 41; terracotta version illustrated p. 42).<br>A. Le Normand-Romain, The Bronzes of Rodin, Catalogue of the Works in the Musée Rodin, vol. I, Paris, 2007, no. S.472, pp. 159-163 (another cast illustrated pp. 158-159).<br>