WIA GC/10904 | Warburg, Aby to M.M. Warburg & Co 16/07/1908 | orders transfer of monies from his account to the accounts of G.v.d. Burg, glazier, D.W. Wechsler... |
WIA GC/28192 | A. Asher & Co. to Warburg, Aby 24/07/1911 | informs him of prices of three books on his list, [August?] Reissmann, Wetterprognosen, Denkmäler |