New York, ca. March 1947 - Photograph Ralph Burns, Edwin A. Finckel, George Handy, Neal Hefti, Johnny Richards and Eddie Sauter
Paris, 18 October 1948 - Institutional correspondence A letter from Mariano Miguel to José Ballester-Gozalvo
Mougins, 10 December 1970 - Personal correspondence A telegram Mariano Miguel, Picasso’s secretary, sent to Raimon Noguera to request the cancellation of the opening ceremony for the expansion of Museo Picasso