FREUD, Sigmund (1856-1939). Autograph note on postcard signed ("Freud"), in German, to Dr. [Ulrich] Grninger. Vienna, 3 January 1922. 1 page, 8vo (90 x 140 mm), some slight toning. Freud thanks his Zurich colleague, and member of the Swiss Psycho-Analyticial Society, for sending his forceful, but restrained defense of his position.