London, 6 November 1938
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Personal correspondence
Archived in
- Roland Penrose Archive, Scottish National Gallery of Modern Art Archives, Edinburgh 13
- Whitechapel Gallery Archive 8
- Musée National Picasso-Paris, Fonds Picasso 6
- Biblioteca y Centro de Documentación, Museo Nacional Centro de Arte Reina Sofía 3
- Warwick Digital Collections, University of Warwick Library 2
- AP Archive 1
- Biblioteca Nacional de España 1