WIA FC/1900/11/10 | Warburg, Aby to Warburg, Max 28/10/1900 | sends his first bi-weekly letter; Max is right, they can stay in touch through writing; supplies... |
WIA FC/1900/11/13 | Warburg, Aby to Warburg, Max 13/11/1900 | thanks him for his long letter; is looking forward to Max Warburg's report on the visit to... |
WIA FC/1902/9/7 | Warburg, Mary to Warburg, Aby 17/02/1902 | thanks for two letters; encourages him to stay on in Berlin; is pleased to read that Warburg is... |
WIA FC/1902/9/9 | Warburg, Aby to Warburg, Mary 19/02/1902 | likes to receive mail from her; he is working in the library; he has ordered multiple copies of... |
WIA FC/1910/4/19 | Warburg, Mary to Warburg, Aby 08/04/1910 | is very happy that his work is making progress; it would be good if he could arrive on his return... |