WIA GC/10774 | 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/11752 | Warburg, Aby to Urtel, Hermann 05/03/1913 | Warburg hopes to attend the club evening on March 12th; hopes that Urtel will be well again by then |
WIA GC/13208 | Urtel, Hermann to Warburg, Aby 11/12/1921 | he is very pleased that the Bibliothek Warburg wants to order the journal 'Revue d'histoire... |
WIA GC/13755 | Saxl, Fritz to Urtel, Hermann 06/01/1922 | requests help with translating an Old French text |
WIA GC/13756 | Urtel, Hermann to Saxl, Fritz 07/01/1922 | he has very little time as his wife is very ill; requests to be sent the proofs of the text and... |