16 Feby 43
W. H. F Talbot Esq
We beg to inform you that the hearing in Messrs Johnson & Wolcotts Patent <1> is appointed for Monday the 20th Instant at 2 o Clock at Mr Attorney Generals Chambers –
We will attend at the time appointed to explain your Invention & request Mr Attorney General to call upon Mr Johnson to deposit the particulars of his invention –
We are Your Ob St
Poole & Carpmael
W. H. F. Talbot Esq
1. John Johnson and Alexander Simon Wolcott, U.K. patent number 9672, 18 March 1843, ‘Photography and its application to the arts’.