WIA GC/1913/1076 | Spiegelberg, Ernst to Warburg, Aby 28/08/1913 | forwards the address of Professor Bert Reese, New York, 230 West 99th Street; regrets that... |
WIA GC/1913/1077 | Spiegelberg, Ernst to Warburg, Aby 08/19/1913 | on the 'phenomenon' [Bert] Reese; forwards a sketch written by Felix Holländer and an article by... |
WIA GC/1916/649 | Warburg, Aby to Spiegelberg, Ernst 18/10/1916 | forwards copy of Jefferson letter on American neutrality; suggests printing a publication in... |
WIA GC/1916/650 | Spiegelberg, Ernst to Warburg, Aby 19/10/1916 | he is interested in Warburg's suggestions; adds that an English version of the Jefferson letter... |
WIA GC/1916/651 | Spiegelberg, Ernst to Warburg, Aby 29/11/1916 | thanks him for an information on the [Anders] Zorn / Lippold controversy in the Zürcher Zeitung |