Georges Riat. Gustave Courbet peintre. Paris, 1906, p. 387, ill. p. 222, as "Tête d'homme," formerly in the Gérard collection.
H. O. Havemeyer Collection: Catalogue of Paintings, Prints, Sculpture and Objects of Art. n.p., 1931, p. 100, call it "Portrait of a Man".
Charles Sterling and Margaretta M. Salinger. French Paintings: A Catalogue of the Collection of The Metropolitan Museum of Art. Vol. 2, XIX Century. New York, 1966, p. 121, ill., suggest it resembles a portrait of Courbet's friend Pierre Auguste Fajon (1862; Musée Fabre, Montpellier; F296), and propose a similar or slightly earlier date.
Robert Fernier. "Un ami de Courbet, M. Luquet." Les amis de Gustave Courbet bulletin no. 45 (1971), pp. 39–40, ill., suggests it may well be a portrait of the collector and dealer [Jules] Luquet.
Robert Fernier. La vie et l'oeuvre de Gustave Courbet. Vol. 1, Peintures, 1819–1865. Lausanne, 1977, p. 244, no. 445, ill. p. 245, calls it "Portrait d'homme, M. Luquet?"; suggests it may represent the dealer Jules Luquet, dates it 1865, and lists a painting in a Swiss private collection (no. 448) as a study for this portrait.
Pierre Courthion. L'opera completa di Courbet. Milan, 1985, p. 99, no. 430, ill. p. 97.
Frances Weitzenhoffer. The Havemeyers: Impressionism Comes to America. New York, 1986, p. 167, pl. 129, dates it 1865 and states that the Havemeyers acquired this picture from Vollard in 1905, with Mary Cassatt serving as intermediary.
Louisine W. Havemeyer. Sixteen to Sixty: Memoirs of a Collector. Ed. Susan Alyson Stein. 3rd ed. [1st ed. 1930, repr. 1961]. New York, 1993, pp. 295, 346 n. 477.
Susan Alyson Stein in Splendid Legacy: The Havemeyer Collection. Exh. cat., The Metropolitan Museum of Art. New York, 1993, pp. 239, 285, pl. 237, dates it 1865.
Gary Tinterow in Splendid Legacy: The Havemeyer Collection. Exh. cat., The Metropolitan Museum of Art. New York, 1993, pp. 23–24.
Gretchen Wold in Splendid Legacy: The Havemeyer Collection. Exh. cat., The Metropolitan Museum of Art. New York, 1993, p. 317, no. A143, ill. p. 316.