London, 6 November 1938 - Personal correspondence Roland Penrose's letter to Pablo Picasso, dated 6 November 1938
New York, 6 January 1960 - Management of reproduction rights A letter from the Spanish Refugee Aid, Inc. to Pablo Picasso
15 September 1960 - Internal museum documents A cheque for Pablo Picasso in payment for the reproductions of Guernica and Three Musicians
2 December 1938 - Institutional correspondence The National Committee for Spanish Aid's letter to Pablo Picasso
London, 30 September 1938 - Personal correspondence Roland Penrose's letter to Pablo Picasso, dated 30 September 1938
London, 7 October 1938 - Personal correspondence Roland Penrose's postcard to Pablo Picasso and Dora Maar