Einstein, Albert (1879-1955). Autograph letter signed (‘A. Einstein’) to Michele Besso’s son, Vero, and sister, Bice Rusconi (‘Lieber Vero und liebe Frau Bice’), Princeton, 21 March 1955. In German, one page, 279 x 216 mm.  Envelope Provenance by descent from the  recipients. Sold for £50,000 on 12 July 2017 at Christie’s in London