WIA FC/1907/5/18
Warburg, Aby to Warburg, Mary 10/04/1907
forwards a card [not extant] to be sent on to [Victor] Singer together with the [Josef Sattler...
WIA GC/1907/695
Singer, Victor to Warburg, Aby 08/04/1907
requests Warburg to give him a copy of his ex libris, made by Josef Sattler, for his collection