WIA FC/1895/11/16 | Warburg, Aby to Warburg, Felix 24/11/1895 | thanks him for letters; is very sad about Olga Leonino's; Warburg received a letter from Dr... |
WIA FC/1902/12/4 | Warburg, Felix to Warburg, Aby 08/04/1902 | thanks him for a copy of Warburg's article ['Bildniskunst']; in San Francisco people were asking... |
WIA FC/1906/7/3 | Warburg, Felix to Warburg, Aby 25/05/1906 | sends birthday wishes to Warburg, the 'fat splendid chap'; on Max [Warburg']s trip to Paris and... |
WIA GC/1895/AMERICA/15 | Ehrich, Louis R. to Warburg, Aby 07/11/1895 | invites him to join on his trip; he has written to a friend 'arranging special particulars for your |
WIA GC/1895/AMERICA/16 | Ehrich, Louis R. to Warburg, Aby 08/11/1895 | he has to postpone his departure for a few days; hopes that Warburg can wait and travel with him |