WIA FC/1908/3/7
Warburg, Mary to Warburg, Aby 10/05/1908
thanks him for letter; it is a lovely Sunday in May, Käthe and Gertrud Embden invited Mary...
WIA FC/1908/3/8
Warburg, Aby to Warburg, Mary 11/05/1908
he spent the whole of the previous day at the du Bois-Reymond home; everybody was very kind...
WIA GC/1902/336
Ostermayer to Warburg, Aby 23/07/1902
congratulations on the birth of the second child, Max Adolph; he enjoyed very much reading...