WIA GC/1895/AMERICA/29 | Warburg, Aby to Fewkes, J. Walter 10/10/1896 | apologizes for late reply; upon returning to Europe he had many things to organise; he was not... |
WIA GC/1896/76 | Steinen, Karl von den to Warburg, Aby 23/12/1896 | forwards a letter |
WIA GC/1896/77 | Warburg, Aby to Karl von den Steinen? [December 1896] | on the plan of an expedition to Mexico, co-financed by Germany |
WIA GC/1897/75 | Steinen, Karl von den to Warburg, Aby 29/09/1897 | congratulates Warburg on his engagement and wonders whether he should congratulate him on his... |