WIA GC/11284 | Warburg, Aby to Marr, Heinz 22/11/1910 | supplies names of people Marr ought to invite as well; [Heinrich?] Embden is prepared to bring... |
WIA GC/28002 | Heskel, Alexander to Warburg, Aby 09/05/1910 | thanks him for a copy of Warburg's article ['Die Wandbilder']; welcomes it that Warburg expressed... |