New York, 10 March 1955 - Institutional correspondence Alfred H. Barr Jr.'s letter to Pablo Picasso, dated 10 March 1955
New York, 9 July 1956 - Institutional correspondence Alfred H. Barr Jr.'s letter to Pablo Picasso, dated 9 July 1956
Paris, 25 June 1954 - Personal correspondence Daniel-Henry Kahnweiler's letter to Pablo Picasso, dated 25 June 1954
New York, 10 March 1955 - Institutional correspondence Alfred H. Barr Jr.'s letter to Dorothy Miller and Dorothy Dudley
New York, 11 March 1955 - Institutional correspondence Alfred H. Barr Jr.'s letter to Daniel-Henry Kahnweiler, dated 11 March 1955
New York, 31 March 1956 - Institutional correspondence Alfred H. Barr Jr.'s letter to Pablo Picasso, dated 31 March 1956
Paris, 17 May 1956 - Personal correspondence Daniel-Henry Kahnweiler's letter to Pablo Picasso, dated 17 May 1956
New York, 17 June 1957 - Institutional correspondence Alfred H. Barr Jr.'s letter Pablo Picasso, dated 17 June 1957
New York, 17 December 1957 - Institutional correspondence Alfred H. Barr Jr.'s letter to Pablo Picasso, dated 17 December 1957