Amsterdam, 9 October 1956 - Institutional correspondence Willem Sandberg's letter to Bo Wennberg, dated 9 October 1956
Stockholm, 10 October 1956 - Institutional correspondence Bo Wennberg's letter to Willem Sandberg, dated 10 October 1956
Amsterdam, 15 October 1956 - Institutional correspondence Willem Sandberg's letter to Bo Wennberg, dated 15 October 1956
Stockholm, 1 October 1956 - Institutional correspondence Bo Wennberg's letter to Willem Sandberg, dated 1 October 1956 (copy)
Amsterdam, 27 February 1956 - Institutional correspondence Willem Sandberg's letter to Robert Giron, dated 27 February 1956
Brussels, 6 December 1956 - Institutional correspondence Robert Giron's letter to Willem Sandberg, dated 6 December 1956
Stockholm, 7 December 1956 - Institutional correspondence Bo Wennberg's letter to Willem Sandberg, dated 7 December 1956
Amsterdam, 10 December 1956 - Institutional correspondence Willem Sandberg's letter to Robert Giron, dated 10 December 1956
Amsterdam, 20 December 1956 - Transport documents A letter from Willem Sandberg to Holland-Amerika Lijn, dated 20 December 1956
Rotterdam, 20 December 1956 - Transport documents A letter from Holland-Amerika Lijn to Willem Sandberg, dated 20 December 1956
Amsterdam, 21 December 1956 - Institutional correspondence Willem Sandberg's letter to Alfred H. Barr Jr.
Rotterdam, 1956 - Transport documents A packing list for the delivery of 6 boxes with Guernica and studies from Amsterdam to New York
New York, 31 March 1956 - Institutional correspondence Alfred H. Barr Jr.'s letter to Pablo Picasso, dated 31 March 1956
New York, 12 May 1956 - Institutional correspondence Alfred H. Barr Jr.'s letter to Pablo Picasso, dated 12 May 1956
Paris, 17 May 1956 - Personal correspondence Daniel-Henry Kahnweiler's letter to Pablo Picasso, dated 17 May 1956
New York, 7 March 1956 - Institutional correspondence A telegram from Edgar Craig Schenk to Pablo Picasso
Paris, 14 November 1964 - Institutional correspondence A letter from Le Groupment des Anciens Etudiantes de l'Université et des Écoles Supérieures de Budapest, etudiant de France [sic], to Pablo Picasso
2 February 1956 - Transport documents A cheque from Nelson Rockefeller to W. R. Keating & Company for the delivery of the replica Guernica tapestry
New York, 10 February 1956 - Institutional correspondence A letter from Louise A. Boyer to Petro (Nelly) Van Doesburg
New York, 10 February 1956 - Institutional correspondence A letter from Alfred H. Barr Jr. to Petro (Nelly) Van Doesburg, dated 10 February 1956