Inscription: The verso, a secondary paper, is annotated in graphite: "40". An undated note on the mat records Guilio Bora's opinion that this is a copy, rather than an original drawing.

Marking: Stamp of Thomas Hudson, British, Devonshire 1701–1779 London, at lower left (Lugt 2432). Stamp of Edward Bouverie, British, Delapré Abbey (1767–1858), at lower right (Lugt 325). No Watermark visible: sheet glued on to a secondary paper.

Thomas Hudson (British, Devonshire 1701–1779 Twickenham); Honorable Edward Bouverie (British, 1767–1858); Dr. Jean Paul Richter, London

Jacob Bean, Lawrence Turcic 17th century Italian Drawings in The Metropolitan Museum of Art. The Metropolitan Museum of Art, New York, 1979, cat. no. 244, fig. no. 244, p. 187, ill.

Bryson Burroughs "Drawings." in The Metropolitan Museum of Art Bulletin. The Metropolitan Museum of Art, vol. 7, no. 5, . New York, May 1912, p. 100.

Luigi Salerno I Dipinti del Guercino. Rome, 1988, cat. no. under no. 178, p. 263.

Sir Denis Mahon Giovanni Francesco Barbieri, Il Guercino. 1591-1666. Disegni Exh. Cat. Bologna, Museo Civico Archeologico, 6 September - 10 November, 1991. Bologna, 1991, cat. no. 108, fig. no. 108, pp. 171-72., ill.

William M. Griswold "Guercino." in The Metropolitan Museum of Art Bulletin. The Metropolitan Museum of Art, n.s. vol. 48, no. 4, New York, Spring 1991, fig. no. 32, pp. 36-37, ill.

Diane De Grazia Selected Baroque Paintings from Italian Banks Exh. cat., Washington, D.C. 26 September - 11 November, 1990 and Toronto, Art Gallery of Ontario, 19 Cecember - 27 January, 1991. 1990-1991. 1991, fig. no. p. 54, pp. 52-54, ill.

Veronique Damian A Rediscovered Sibyl by Guercino. Paris, 2002, fig. no. 2, pp. 10, 15, ill.

Per Bjurström, Catherine Loisel, Elizabeth Pilliod Drawings in Swedish Public Collections: Italian Drawings. Florence, Siena, Modena, Bologna. 8, Stockholm, 2002, cat. no. under no. 1560, n.p.