WIA GC 1930/2327 | Saxl, Fritz to Niessen, Carl 23/07/1930 | |
WIA GC 1930/2328 | Niessen, Carl to Saxl, Fritz 24/07/1930 | |
WIA GC 1930/2329 | Saxl, Fritz to Niessen, Carl 14/10/1930 | |
WIA GC/12896 | Warburg, Aby to Niessen, Karl Hubert 23/04/1928 | despite Niessen's information Warburg's friend could not find the engravings by Epifanio d... |
WIA GC/12897 | Warburg, Aby to Niessen, Karl Hubert 16/06/1928 | he is still searching for two sheets of Epifanio d'Alfiano engravings; acknowledges receipt of... |