New York, 6 May 1955 - Institutional correspondence A letter from W.R. Keating & Company International to R. Lerondelle
New York, 23 January 1957 - Transport documents A letter from the vice-president of W. R. Keating & Company to Willem Sandberg
Madrid, 10 September 1981 - Photograph The boxes protecting Guernica are taken out of the lorries and taken into the Casón del Buen Retiro