To Robert Main 27 July 1
Down Bromley Kent
On my return home yesterday I received your note of the 23d & the copies of my article on Geology in Admiralty Scientific Manual,2 for which I am much obliged & remain
Dear Sir | Yours faithfully | C. Darwin
Thanks RM for copies of CD’s article on geology in the Admiralty scientific manual [J. F. W. Herschel ed., A manual of scientific enquiry (1849)].