Octave Mirbeau et al., Auguste Rodin et son œuvre, Paris, 1900, another cast illustrated p. 33<br><br> Rainer Maria Rilke, Auguste Rodin, Leipzig, 1922, another cast illustrated pls. 22 & 23<br><br> Léonce Bénédite, Rodin – A Series of 60 Photogravure Plates, London, 1924, another cast illustrated pl. XVI<br>Judith Cladel, Auguste Rodin, sa vie glorieuse, sa vie inconnue, Paris, 1936, mentioned pp. 142- 143<br><br> Georges Grappe, Le Musée Rodin, Monaco, 1944, another cast illustrated p. 44<br><br> Marcel Aubert, Rodin Sculptures, Paris, 1952, another cast illustrated p. 21<br>Albert E. Elsen, Auguste Rodin, London, 1962, another cast illustrated p. 51<br><br> Cécile Goldscheider, Rodin, Paris, 1962, another cast illustrated p. 61 <br>Albert E. Elsen, Auguste Rodin, Readings on his Life and Work, Englewood Cliffs, New Jersey, 1965, another cast illustrated p. 164 <br><br>Robert Descharnes & Jean-François Chabrun, Auguste Rodin, Paris, 1967, another cast illustrated in colour p. 99<br>Ionel Jianou & Cécile Goldscheider, Rodin, Paris, 1967, a plaster version illustrated pl. 17<br>Albert E. Elsen, Rodin, London, 1974, another cast illustrated p. 51<br>John L. Tancock, The Sculpture of Auguste Rodin. The Collection of the Rodin Museum, Philadelphia, Philadelphia, 1976, another cast illustrated pp. 149 & 151<br>Jacques de Caso & Patricia B. Sanders, Rodin's Sculpture. A Critical Study of the Spreckels Collection, San Francisco, 1977, a plaster version illustrated p. 142<br><br> Albert E. Elsen, In Rodin’s Studio, A Photographic record of sculpture in the making, Ithaca, New York, 1980, another cast illustrated pls. 24-26<br>Clare Vincent, 'Rodin at the Metropolitan Museum of Art. A History of the Collection', in The Metropolitan Museum of Art Bulletin, vol. XXXVIII, no. 4, Spring 1981, another cast illustrated p. 4 <br>Albert E. Elsen, The Gates of Hell by Auguste Rodin, Stanford, 1985, pp. 74-78, no. 64, another cast illustrated <br><br> Alain Beausire, Quand Rodin exposait, Paris, 1988, a plaster version illustrated p. 209<br><br> Ruth Butler, Rodin, The Shape of Genius, New Haven & London, 1993, another cast illustrated p. 161<br><br>Antoinette Le Normand-Romain, The Bronzes of Rodin, Catalogue of Works in the Musée Rodin, Paris, 2007, vol. I, illustrations of another cast pp. 338-340, 345 & 347