WIA GC/14867 | Schütt, Richard to Warburg, Aby 19/10/1924 | thanks him for birthday greetings; suggests a reunion on the occasion of the 40th anniversary of... |
WIA GC/2335 | Schäffer, Cäsar to Warburg, Aby 10/12/1906 | informs him that the Science Museum will deliver exhibits for a lecture which Schäffer will give... |
WIA GC/8176 | Schäffer, Cäsar to Warburg, Aby 22/01/1914 | asks Warburg to reconsider in the question of the museum project; a museum with research... |