WIA GC/10640 | Warburg, Aby to M.M. Warburg & Co.19/09/1907 | requests copy of the financial transaction from Berthold Riehl to the bank M. M. Warburg & Co. in... |
WIA GC/10668 | Warburg, Aby to Riehl, Berthold 25/07/1907 | requests from Riehl as the former treasurer of the committee to forward the strongbox and the... |
WIA GC/10677 | Warburg, Aby to Riehl, Berthold 19/08/1907 | acknowledges receipt of cash and ledgers from the former chairman of the International Congress... |
WIA GC/10678 | Warburg, Aby to Riehl, Berthold 20/08/1907 | queries in connection with the accounts of the International Congress of the History of Art... |
WIA GC/10679 | Warburg, Aby to Kautzsch, Rudolf; Koetschau, Karl 19/08/1907 | replies to Strzygowski's letter of 11/08/1907; on the need to found an art historical society... |