WIA GC/15787 | Warburg, Aby to Doren, Alfred 05/12/1925 | thanks him for his letter; his friend [Luigi] Petri has died in Florence; does Doren know... |
WIA GC/1806 | Petri, Luigi to Warburg, Aby 20/09/1905 | thanks him for sending him an essay |
WIA GC/25941 | Warburg, Aby to Warburg, Charlotte 25/12/1894 | thanks for addresses, letter etc.; Alfred Doren has left for Frankfurt for three weeks; Herr von... |
WIA GC/26508 | Petri, Anna to Warburg, Aby 28/07/1897 | congratulates him on his engagement; hopes to see him and Mary soon in Florence; sends greetings... |
WIA GC/26509 | Petri, Luigi to Warburg, Aby 28/07/1897 | congratulates him on his engagement; hopes to see him soon |