To J. G. Forchhammer 20 May 
Down Farnborough Kent
My dear Forchhammer
I ought to have written sooner to have thanked you very sincerely for your letter of the 27th of April: it told me quite fully & most clearly, all that I wanted to know of your Geology.1
Prof. Steenstrup’s specimen which I owe first to your kindness have been of great use & interest to me: I have now described 33 fossil Pedunculated Cirripides, & they are in Mr Sowerby’s hands to make drawings of.—
With my very sincere thanks | Believe me | Yours very truly | Charles Darwin
Thanks JGF for geological information.
Steenstrup’s cirripede specimens have been of great use and interest. CD has now described 33 fossil pedunculated cirripedes.
Please cite as
Darwin Correspondence Project, “Letter no. 1328,” accessed on 23 February 2017, http://www.darwinproject.ac.uk/DCP-LETT-1328