Tokyo, 20 November 1962 - Institutional correspondence Akira Jin's letter to Pablo Picasso, dated 20 November 1962
Tokyo, 1 April 1963 - Institutional correspondence Akira Jin's letter to Pablo Picasso, dated 1 April 1963
16 November 1939 - Personal correspondence A letter from Francisco De Troya to Pablo Picasso, dated 16 November 1939
23 November 1939 - Personal correspondence Francisco de Troya's letter to Pablo Picasso, dated 23 November 1939