A letter from Georges Braque (French painter, sculptor, printmaker and draughtsman linked with Fauvism and Cubism) to Flechtheim, on 14 Jun 1936, in which he discusses the latter's application for French nationality. A photocopy of this letter can be found at NGA27/32/4/1.
For more general information about Alfred Flechtheim, refer to the description at NGA27/32/4.