London, 6 November 1938 - Personal correspondence Roland Penrose's letter to Pablo Picasso, dated 6 November 1938
New York, April 14, 1967 - Letter Alfred H. Barr Jr.'s letter to Daniel-Henry Kahnweiler, dated 14 April 1967
New York, 14 April 1967 - Institutional correspondence Alfred H. Barr Jr.'s letter to Daniel-Henry Kahnweiler, dated 14 April 1967
Charlotte, 27 January 1967 - Institutional correspondence Constance H. Nicholson's letter to Carol K. Uht
Gothenburg, 26 January 1938 - Institutional correspondence Tor Bjurstöm's letter to Sven Strindberg, dated 26 January 1938
Barcelona, 2 December 1938 - Institutional correspondence Letter from Manuel Sánchez Arcas to José Prat