Paris, 4 December 1953 - Personal correspondence Daniel-Henry Kahnweiler's letter to Pablo Picasso, dated 4 December 1953
New York, 7 October 1953 - Institutional correspondence A letter from Letitia T. Howe to Pablo Picasso
20 September 1954 - Institutional correspondence Maurice Jardot's letter to Jaime Sabartés, dated 20 September 1953