1From Benjamin Franklin to Graf von Brühl, 22 August 1783 (Franklin Papers)
ALS : Scottish Record Office M. de Kempel, the ingenious Author of the Automaton that plays Chess, will have the Honour of putting this Line into the Hands of your Excellency; and I beg leave to recommend him to your Protection, not merely on Account of that wonderful Machine, but as a Genius capable of being serviceable to Mankind by more useful Inventions which he has not yet communicated....