E. Hennequin, "Odilon Redon," Beaux-Arts, 1886.
J.E. Schmitt, "Choses d'art, Exposition Odilon Redon," Le Siècle, 31 March 1894, p. 2.
P. Verdun, "Album d'artiste," Le peuple français, 31 March 1894, p. 2.
Auriant, "Des lettres inédites d'Odilon Redon," Beaux-Arts, no. 127, 7 June 1935, p. 2.
D.W. Druick, ed., Odilon Redon: Prince of Dreams, exh. cat., The Art Institute of Chicago, 1994, pp. 128-129, 134-135 and 453 (illustrated, p. 129, fig. 5:4 and illustrated again, p. 135, fig. 13:14).
O. Christ, "Wiederentdeckung eines Mystikers," Kunst und Antiquitäten, December 1994, p. 14 (illustrated in color, fig. 4).
A. Wildenstein, Odilon Redon: Catalogue raisonné de l'oeuvre peint et dessiné, Etudes et grandes décorations, Supplément, Paris, 1998, vol. IV, p. 275, no. 2635 (illustrated; illustrated again in color, p. 328).
B. Larson, The Dark Side of Nature: Science, Society, and the Fantastic World of Odilon Redon, University Park, Pennsylvania, 2005, pp. 90-91(illustrated, p. 91, fig. 76).