WIA GC/1901/45 | Heylbut, Gustav to Warburg, Aby 06/08/1901 | explains a Horace passage 'cui male si palpere, recalcitrat undique tutus'; sends greetings |
WIA GC/1902/195 | Heylbut, Gustav to Warburg, Aby 26/02/1902 | thanks him very much for a copy of his book, 'Bildniskunst', with a personal dedication |
WIA GC/1902/196 | Heylbut, Gustav to Warburg, Aby 15/12/1902 | accepts a dinner invitation |
WIA GC/1903/142 | Heylbut, Gustav to Warburg, Aby 04/01/1903 | supplies bibliographical reference, found in [B. de] Montfaucon Bibl.bibl., Bibl. Laurentiana pl... |
WIA GC/1903/143 | 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... |