WIA GC/1909/13 | Becker, Carl Heinrich to Warburg, Aby 19/11/1909 | regrets but cannot assist Warburg with his Picatrix inquiry; he has never heard about him... |
WIA GC/1909/14 | Becker, Carl Heinrich to Warburg, Aby 22/12/1909 | replies to a request by Warburg on Arabic etymologies of names for stars |
WIA GC/1909/529 | Warburg, Aby to Schwedeler-Meyer, Ernst 15/07/1909 | replies to a threatening letter by Schwedeler-Meyer; a detailed report on the moves to establish... |
WIA GC/1910/28 | Becker, Carl Heinrich to Warburg, Aby 10/05/1910 | thanks him for Warburg's 'spirited polemic' against H. Vogel ['Die Wandbilder']; Warburg's... |
WIA GC/1910/30 | Becker, Carl Heinrich to Warburg, Aby 20/06/1910 | on the publications 'Orientalisches Archiv', edited by Grothe, and 'Islam', published by him... |