DARWIN, Charles (1809-1882). Letter signed ('Ch. Darwin') to an unidentified recipient [Richard Kippist, librarian of the Linnean Society], Down, 18 January [1865], 'I send by the courier tonight a long paper for the Society' [his paper on 'Climbing plants'], asking for an acknowledgement of its arrival, one page, 8vo, on a bifolium, docketed by recipient.