Copper & Steel Plate Printing Office.
78, Margaret St. Cavendish Sqre W.
14 May 1858
By railway this evening I have sent you plates and 2 proofs of each. Allow me to say I think they are a great advance upon all former ones pressed by me
I have named your process to Mess Colnaghi they promised to bring it before Sir A Vernon and try it But I presume upon the principle of great bodies moving slow nothing has been done with at present Thanking you on their behalf for the Kind offer
I am Yr Obt Sert
[added in WHFT's hand:] Brooker
H. Fox Talbot Esq