Eugène Delacroix. Journal entry. March 13, 1849 [published in Ref. Joubin 1932, vol. 1, p. 277], calls it "Hamlet et la scène du rat" and notes that he sold it to the dealer Beugniet (misspelled "Bouquet") for Fr 100.
Eugène Delacroix. Letter to Monsieur Beugniet. February 8, 1849 [published in Ref. Joubin 1936, p. 374], notes that he has sold him this picture for Fr 100 and calls it "une petite esquisse représentant Hamlet".
Eugène Delacroix. Journal entry. February 4, 1849 [published in Ref. Joubin 1932, vol. 1, p. 257], records that he finished this work.
Théophile Silvestre. Delacroix. Paris, 1855, p. 81, as "Hamlet tuant Polonius".
Alfred Robaut. L'œuvre complet de Eugène Delacroix. Paris, 1885, p. 205, no. 766, as "Hamlet tuant Polonius"; claims that it was sold to Perreau for Fr 2,700 in the Diaz sale of 1877.
Loys Delteil. "Ingres & Delacroix." Le peintre-graveur illustré (XIX et XX siècles). 3, Paris, 1908, unpaginated, under no. 111, mentions that this work was included in the Diaz sale of 1877.
André Joubin. Journal de Eugène Delacroix. Paris, 1932, vol. 1, p. 277 n. 1, identifies this work as a picture referred to by Delacroix in his journal entry for March 13, 1849 as "Hamlet et la scène du rat," and listed as having been sold to the dealer Bouquet for Fr 100.
André Joubin. Correspondance générale d'Eugène Delacroix. 2, Paris, 1936, p. 374 n. 1, identifies a work mentioned by Delacroix in a letter of February 8, 1849 as having been sold to M. Beugniet for Fr 100 as either this picture or Robaut no. 765, "Hamlet hésitant à tuer le roi".
Luigina Rossi Bortolatto. L'opera pittorica completa di Delacroix. Milan, 1972, pp. 108–9, no. 376, ill. (lithograph), does not give an owner, but lists it as Robaut no. 766; dates it 1843.
Lee Johnson. The Paintings of Eugène Delacroix: A Critical Catalogue. 3, Oxford, 1986, pp. 119, 346, 354, no. 293 and under no. 294, as "Hamlet about to Kill Polonius;" states that it is this picture, and not R943 (J319), that Delacroix records as finishing in his journal entry for February 4, 1849 [see Ref. Joubin 1932, p. 257 n. 2].
Lee Johnson. The Paintings of Eugène Delacroix: A Critical Catalogue. 4, Oxford, 1986, pl. 112.
Katharine Lochnan in Drama and Desire: Art and Theatre from the French Revolution to the First World War. Exh. cat., Musée Cantini, Marseilles. Milan, 2010, p. 184, no. 91, ill. p. 191 (color), dates it about 1830.