WIA GC/10564 | Warburg, Aby to Heylbut, Gustav 21/02/1907 | on the Argyropoulos manuscript; quotes parts of a Greek and Latin passage and requests Heylbut to... |
WIA GC/1102 | Heylbut, Gustav to Warburg, Aby 27/02/1903 | on two inscriptions, on a triumphal arch and in verse, which may have originated in the Lorenzo... |
WIA GC/1652 | Heylbut, Gustav to Warburg, Aby 04/04/1905 | thanks him for his reports on the Berlin lecture |
WIA GC/1653 | Heylbut, Gustav to Warburg, Aby 13/12/1905 | supplies bibliographical information |
WIA GC/2 | Koepp, Friedrich to Warburg, Aby 26/07/1917 | thanks him in his own and in the name of his sister; he does not want to receive a book from... |