Madrid, 5 November 1980 - Institutional correspondence A letter from Íñigo Cavero to Blanche de Philip P. Weisberg (Blanche Mahler)
ca. 1981 - Manuscript Comments on the declarations of Blanche Mahler regarding the arrival of Guernica to New York
3 May 1939 - Invoices Shipping invoice to the Valentine Gallery for the delivery of paintings from Normandy to New York