March 21 1863
Dear Sir,
Your proofs of engraving must needs be very quick, if you can so soon report either a success or a failure. I hope that your next attempt with shorter exposure, will answer better: if not I will try to make a more intense photograph for your purpose.
I have got something enlarged out of your Grenada view, but hope to have better next week.
Yours very truly
C. Piazzi Smyth.
[envelope:]
H. Fox Talbot Esqe F.R.S.
11 Great Stuart Street
Edinburgh