Pierre Puvis de Chavannes. Letter. 1889 [excerpt published in L. Wehrlé, "Lettres (1888–1898)," La Revue de Paris 18 (February 1, 1911), p. 456], states that he modified this picture in order to make it less crude and more marketable, commenting that it "a pris un aspect moins cruel pour les bourgeois".
[Roger Riordan]. "The Atelier: Puvis de Chavannes. I." Art Amateur 24 (December 1890), p. 5, calls it a cartoon of the Sorbonne mural, "touched up since the completion of the work" and notes that it is currently on loan to the MMA by Mr. Havemeyer.
Camille Mauclair. Puvis de Chavannes. Paris, 1928, p. 162, lists it as a sketch for the Sorbonne decoration.
"The H. O. Havemeyer Collection." Parnassus 2 (March 1930), pp. 5, 7–8.
Frank Jewett Mather Jr. "The Havemeyer Pictures." The Arts 16 (March 1930), p. 483, ill. p. 455, as "The Sacred Grove"; calls it a finished study for the Sorbonne decoration; suggests that the Havemeyers only purchased this and other Puvis pictures through Cassatt's persuasion.
H. O. Havemeyer Collection: Catalogue of Paintings, Prints, Sculpture and Objects of Art. n.p., 1931, pp. 166–67, ill., as "The Sacred Grove"; calls it a sketch for the Sorbonne decoration.
Charles Sterling and Margaretta M. Salinger. "XIX Century." French Paintings: A Catalogue of the Collection of The Metropolitan Museum of Art. 2, New York, 1966, pp. 229–30, ill., call it a reduced version of the completed Sorbonne mural; note that it possibly influenced Gauguin's "Where Do We Come From? What Are We? Where Are We Going?" (1897–98; Museum of Fine Arts, Boston).
Carl R. Baldwin The Metropolitan Museum of Art. The Impressionist Epoch. [New York], 1974, p. 23.
Richard J. Wattenmaker. Puvis de Chavannes and the Modern Tradition. Exh. cat., Art Gallery of Ontario. Toronto, 1975, p. 23 n. 4.
Frances Weitzenhoffer. "The Creation of the Havemeyer Collection, 1875–1900." PhD diss., City University of New York, 1982, pp. 112–13, 132, 143 n. 21, fig. 21.
Frances Weitzenhoffer. The Havemeyers: Impressionism Comes to America. New York, 1986, pp. 60, 66, 177, 257.
Susan Alyson Stein in Splendid Legacy: The Havemeyer Collection. Exh. cat., The Metropolitan Museum of Art. New York, 1993, p. 210.
Gretchen Wold in Splendid Legacy: The Havemeyer Collection. Exh. cat., The Metropolitan Museum of Art. New York, 1993, p. 371, no. A438, ill.
Aimée Brown Price. Pierre Puvis de Chavannes. Exh. cat., Van Gogh Museum. Amsterdam, 1994, pp. 21, 27 n. 100, p. 256.
Aimée Brown Price. "The Artist and His Art." Pierre Puvis de Chavannes. 1, New Haven, 2010, pp. 136, 165, 215 n. 405, refers to it as both a reduced version of and a "difficult oil sketch" for the Sorbonne mural; notes that it was purchased by the Havemeyers soon after its completion.
Aimée Brown Price. "A Catalogue Raisonné of the Painted Work." Pierre Puvis de Chavannes. 2, New Haven, 2010, pp. 312, 315, no. 333, ill., calls it a study for the Sorbonne mural, describing it as "essentially a grand oil sketch that sets out all the elements of the great sacred grove".