WIA GC/1914/505 | Keutgen, Nancy to Warburg, Aby 28/10/1914 | thanks him for a brochure [Rivista Illustrata]; corrects linguistic mistakes in the new... |
WIA GC/1914/506 | Warburg, Aby to Keutgen, Nancy 18/12/1914 | asks her to forward copies of 'The Times' with articles on the Bridges - Jungbluth exchange of... |
WIA GC/1914/507 | Keutgen, Nancy to Warburg, Mary [1914] | forwards a letter [or article?] by her friend Professor Victor Michels in Jena in which [Ernst... |
WIA GC/1920/137 | Keutgen, [Nancy?] to Warburg, Mary [1920] | informs Mary Warburg what she was told about the sanatorium in Jena by a friend of hers, wife of... |
WIA GC/1928/1170 | Keutgen, Friedrich and Keutgen, Nancy to Warburg, Aby 30/06/1928 | thanks him for a copy of his article on Cassirer; hopes that Warburg's and Cassirer's wishes will... |