20 Mornington Road
N. W.
Novr 23. 1858.
Dear Sir
Mr Paul Pretsch has written to me enclosing some specimens of a sort of Photolithographic1 process which he wishes me to illustrate in the same way as the Photoglyphic process was illustrated. The way of obtaining them is to prepare a photogalvanographic copper plate (Pretsch’s process) and from this to take a transfer on stone and thence to print in the usual lithographic way. As the expense would not be much, and as I imagine my readers to be interested in all new processes of this sort, I do not think there would be any difficulty in getting Petter & Galpin 2 to accede to his wishes. My object in now writing to you is to ask whether the process is at all an infringement of either of your patents as I should be very unwilling to do anything in the matter if you had any objection. I enclose a small specimen which he has sent me. The half tones are very good but it is not to be compared with the results of the Photoglyphic Process –
Believe me very truly yours
William Crookes.
H. F. Talbot Esqre
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