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... |
WIA GC/1907/744 | Urtel, Hermann to Warburg, Aby 14/12/1907 | he wants to borrow the Festschrift for Gröber from Warburg |
WIA GC/1910/588 | Urtel, Hermann to Warburg, Aby 10/05/1910 | thanks him for a copy of Warburg's article ['Die Wandbilder']; forwards a card with the date for... |