To John Whitehurst4
ALS: Descendants of the Rawle and Corning Families, Connecticut (2010)
Passy Augt. 22. 1783.
The Bearer, Mr Kempel, is the Creator of the Wooden Man who plays so well at Chess; but he is very ingenious in other Matters of more Importance, and has some useful Inventions to communicate to the Publick. I beg leave to recommend him to you Civilities, and to request your Advice to him, as to the Manner of making those Communications so as to produce some Benefit to himself. With great Esteem, I am ever, Dear Sir, Your most obedient & most humble Servant
4. The Derbyshire clockmaker and scientist: XXXIX, 330.