Camille Mauclair, Auguste Rodin: The Man—His Ideas—His Works, London, 1905, illustration of another cast p. 28<br>Rainer Maria Rilke, Auguste Rodin, London, 1917, illustration of the marble version pl. 7<br>Georges Grappe, Catalogue du Musée Rodin, Paris, 1927, illustration of the marble version no. 77<br>Sommerville Story, Rodin, New York, 1939, nos. 43-45, illustration of the marble version p. 145<br>Albert Edward Elsen, Rodin (exhibition catalogue), Museum of Modern Art, New York, 1963, illustration of the marble version p. 132<br>Robert Descharnes & Jean-François Chabrun, Auguste Rodin, Lausanne, 1967, illustration of the marble p. 83<br>Ionel Jianou & Cécile Goldscheider, Rodin, Paris, 1967, illustration of the marble version pl. 28<br>Cécile Goldscheider, Rodin (exhibition catalogue), The Hayward Gallery, London, 1970, illustration of another cast p. 38<br>John L. Tancock, The Sculpture of Auguste Rodin, Philadelphia, 1976, no. 35, illustration of the marble version p. 255<br>Antoinette Le Normand-Romain, The Bronzes of Rodin, Catalogue of Works in the Musée Rodin, vol. I, Paris, 2007, illustration of another cast and of the marble pp. 292-94