WIA FC/1911/5/13 | Warburg, Mary to Warburg, Aby 02/07/1911 | thanks him for a postcard; is pleased that he likes his stay; the day at Kösterberg was good... |
WIA FC/1924/5/73 | Warburg, Mary to Warburg, Aby 09/02/1924 | young Simms brought her greetings from Warburg and the thimble for Frede; he told her of his... |
WIA GC/1905/500 | Schmidt, Robert to Warburg, Aby 25/07/1905 | since Dr. [Hermann] Urtel insisted that Schmidt write the preface to the Hugschappel [Hug... |
WIA GC/1905/615 | Urtel, Hermann to Warburg, Aby 21/07/1905 | change of appointment |
WIA GC/1907/482 | Warburg, Aby to Lenhartz, Hermann Alb. Dietrich 10/12/1907 | forwards a letter by his brother Max Warburg [no longer extant] with a reference to Mr. U. [Urtel... |