see Autobiography of Francis Olace, ed. Mary Thale p. 53-4 (in Greyhound Court where Place learned to turn and file) Place made a simple error calling him Cuthbertson. There was indeed a John Cuthbertson, mathematical, philosophical and optical instrument maker c.1743-1821 who worked in Amsterdam in the 1770s and 1780s and then returned to London, trading in Shoe Lane Holborn and then Poland Street. However the mathematical instrument maker in Greyhound Court was David Cuthbert
A David Cuthbert was apprenticed to James Mackay coppersmith of Edinburgh for 6 yrs on 13.8.1768, premium…