WIA GC/1909/124 | Eucken, Rudolf to [?] 14/05/1909 | thanks him for a letter; is grateful for being permitted to summarize his views about increasing... |
WIA GC/1909/625 | Warburg, Aby to Warburg, Max 27/08/1909 | on the discussion re establishment of a university in Hamburg; Rudolf Eucken's and Hermann Diels... |
WIA GC/1914/688 | Eucken, Rudolf [reference for Peter Petersen] 13/12/1913 | reference for Peter Petersen; his plan to write a history of Aristotelianism in Protestant... |
WIA GC/1925/962 | Muckle, Friedrich to Warburg, Aby 01/02/1925 | forwards his book 'Geist der jüdischen Kultur und das Abendland'; was very happy meeting Warburg... |