My dear Forchhammer

I ought to have written sooner to have thanked you very sincerely for your letter of the 27^th 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 M^r Sowerby’s hands to make drawings of.—

With my very sincere thanks | Believe me | Yours very truly | Charles Darwin