21 Lincolns Inn Fields
29 Feby 1844
I have received from Mr Claudet <1> a new dt of a licence from yourself to him to use the Calotype – and from what he says I think it possible that my copy of the former draught licence was handed to you – if so I request the favor of your returning it to me – I presume that it is intended that Mr Claudet shall have the liberty to use the inventions or improvements mentioned in the Specification of your second patent <2> and also any further improvements you may make.
I am sir Your obedient Servant
1. Antoine Françoise Jean Claudet (1797–1867), London; French-born scientist, merchant & photographer, resident in London.
2. WHFT took out a patent entitled ‘Photography’, U.K. number 9,753, 1 June 1843.