Marin BUBER (1878–1965). Handwritten letter, Heppenheim, November 24 [1929], to Mark Wischnitzer in Berlin-Wilmersdorf; 1 page, in-12 format, with address and stamp on the back (Postcard; punch holes); in German. He agrees to contribute a short essay to the “Dubnow Festschrift”: “Der Chassidismus und die allgemeine Religionsgeschichte.”