Alfred H. Barr Jr., director of the Museum of Modern Art, New York, Aleksina Matisse, Georgia O'Keefe and Sidney Janis, director of the Organising Committee of the exhibition Picasso's Guernica, for the Spanish Refugee Relief Campaign, all accept the invitation to a private visit to the exhibition and indicate the amount they are donating to the Spanish Refugee Relief Campaign.

Reference in the source Archive:
Spanish Refugee Relief Association Record, 1935-1957, Part D: Affairs, Box 11, Picasso Exhibit n. 3

Courtesy Rare Book & Manuscript Library, Columbia University in the City of New York

Acceptance letters from Alfred H. Barr Jr., Aleksina Matisse, Georgia O'Keefe and Sidney Janis to Caspar Whitney