Georges Grappe, Catalogue du Musée Rodin, Paris, 1927, no. 148, illustration of the marble version p. 59 Albert E. Elsen, Rodin, New York, 1963, illustration of a larger cast p. 63 Robert Descharnes and Jean-François Chabrun, Auguste Rodin, Paris, 1967, illustration of the marble version p. 131 John L. Tancock, The Sculpture of Auguste Rodin, Philadelphia, 1976, illustration of the marble version p. 77 Antoinette Le Normand-Romain, The Bronzes of Rodin, Catalogue of Works in the Musée Rodin, Paris, 2007, illustration of another cast p. 161 Rainer Crone & Siegfried Salzmann, Rodin, Eros and Creativity, Munich, 1992, illustration of the marble version pl. 13 Albert E. Elsen, In Rodin's Studio, A photographic record of sculpture in the making, New York, 1980, illustration of the marble version pl. 108 Hélène Pinet, Rodin, Sculpteur et les photographes de son temps, Paris, 1985, illustration of the marble version pl. 15-18 Joan Vita Miller & Gary Marotta, Rodin, The B. Gerald Cantor Collection, New York, 1986, illustration of the marble version p. 177.