Letter from Magritte to Gaspero del Corso, 6 November 1952.
Letter from Magritte to Gaspero del Corso, 11 December 1952.
ed. D. Sylvester, René Magritte, catalogue raisonné: gouaches, temperas, watercolours and papier collés 1918-1967, vol. IV, Antwerp 1994, no. 1348 (illustrated p. 151).
Rome, Galleria dell'Obelisco, René Magritte, January 1953, no. 14 (illustrated).