WIA FC/1902/9/34 | Warburg, Aby to Warburg, Mary 21/04/1902 | thanks her for letter, is pleased to read that Detta [Marietta Warburg] is drawing; understands... |
WIA FC/1902/9/38 | Warburg, Aby to Warburg, Mary 23/04/1902 | he is in the Warburg apartment together with Tilli [Mathilde Jolles] to look for the things which... |
WIA FC/1903/6/15 | Warburg, Mary to Warburg, Aby 21/02/1903 | sends greetings; everything is fine at home, little Max Adolph is very well; a letter by [Jan... |
WIA GC/1902/228 | Kalf, Jan to Warburg, Aby 02/02/1902 | |
WIA GC/1903/160 | Kalf, Jan to Warburg, Aby 06/05/1903 | in reply to Warburg's request he sends him bibliographical information on Dutch folkloristic... |