Paris, 4 December 1953 - Personal correspondence Daniel-Henry Kahnweiler's letter to Pablo Picasso, dated 4 December 1953
São Paulo, 4 February 1954 - Institutional correspondence Francisco Matarazzo Sobrinho's letter to Pablo Picasso, dated 4 February 1954
New York, 7 October 1953 - Institutional correspondence A letter from Letitia T. Howe to Pablo Picasso