[This is an invoice for the period of 3 March 1860 - 14 January 1861, with the following letter.]
To W. Banks & Son
Lithographers, Draughtsmen. Steel and Copperplate Printers, &c
26 Waterloo Place
You will see from a Note that I have enclosed in the parcel with plates fm Greigs the Engineers, that they cannot Case Harden the steel from its thinness, this I was doubtful of from the beginning as all the plates I can get hardened were of a very thick description, fully ½ an inch thick.
I am Sir yours respectfully
H F. Talbot Esq