Mitteilungen der Eugen Rosenstock-Huessy Gesellschaft 19 and 20 (Spring 1974): 25 and p. 27f. [To the mother of Franz from June 1921 and December 1922, on Franz’s illness. To Else Freund from February 17, 1937, on her book on Rosenzweig.] Not microfilmed. – 1974