WIA GC/1899/5 | Warburg, Aby to Brockhaus, Heinrich 25/05/1899 | apologizes for not visiting him; Warburg had a sore throat; asks Brockhaus to give the bearer of... |
WIA GC/1899/6 | Brockhaus, Heinrich to Warburg, Aby 25/05/1899 | is very sorry that Warburg is not well; sends him requested books except for Fritz Knapp, as it... |
WIA GC/1906/497 | Warburg, Aby to Neumann, Carl 21/11/1906 | thanks him for a letter in which Neumann gave his reasons why he cannot give a lecture as... |
WIA GC/1907/636 | Sachs, Curt to Warburg, Aby 21/02/1907 | forwards a copy of [Fritz] Knapp's 'Perugino' and requests a review |
WIA GC/1924/533 | Hermanin de Reichenfeld, Federico to Warburg, Aby 19/10/1924 | it is not a question of 'initiative' to obtain the photographs of the ceiling in the Farnesina... |