WIA GC/1907/478
Lenel, Walter and Lenel, Luise to Warburg, Aby and Warburg, Mary 02/01/1907
New Year greetings
WIA GC/1907/479
Lenel, Walter and Lenel, Luise to Warburg, Aby 02/01/1907
New Year greetings; best wishes for the 'Habilitation'