Federer, Heinrich
born 6. October 1866 in Brienz; died 29. April 1928 in ZürichBrief von Heinrich Federer an Hans Vaihinger, 23.04.1917 [23.04.1917]
Zürich, 23.04.1917 [23.04.1917]Foerster, Friedrich Wilhelm
born 2. June 1869 in Berlin; died 9. January 1966 in Kilchberg (Kanton Zürich)Brief von Friedrich Wilhelm Foerster an Hans Vaihinger, o.D. [04.08.????]
Weichselmünde ; Freiburg, o.D. [04.08.????]Brief von Friedrich Wilhelm Foerster an Hans Vaihinger, o.D. [16. 12.????]
Freiburg, o.D. [16. 12.????]Ludwig, Emil
born 25. January 1881 in Breslau; died 18. September 1948 in Ascona-MosciaBrief von Emil Ludwig an Hans Vaihinger, 06.01.1923
Heidelberg, 06.01.1923