WIA GC/12477 | Warburg, Aby to Spiegelberg, Ernst [09/10/1918] | [the first part is a copy, made by Mary Warburg, of a reply by Paul M. Warburg in the US to an... |
WIA GC/12646 | Spiegelberg, Ernst to Warburg, Aby 30/09/1920 | on the newly created authority called 'Reichskunstwart'; asks his opinion on the need for such an... |
WIA GC/12737 | Spiegelberg, Ernst to Warburg, Aby 10/07/1923 | he spoke with Dr. Binswanger [Ludwig Binswanger?] on the phone who gave him the impression that... |
WIA GC/12738 | Spiegelberg, Ernst to Warburg, Aby 11/07/1923 | advises him which route to take for his trip to Hamburg in order to avoid changing trains; the... |
WIA GC/12739 | Spiegelberg, Ernst to Warburg, Aby 15/07/1923 | on his return to Hamburg he spoke with Max Warburg, Fritz Warburg, Mary Warburg and Dr. [Heinrich... |