Sends CD a paper ["Ant-agency in plant structure", published in Spruce Notes of a botanist on the Amazon and Andes, ed. A. R. Wallace (1908)] on plant structures he believes are the work of insects; asks him to forward it to the Linnean Society [read 15 Apr 1869].
Writes of his support for the Origin, before which he had been much concerned by the delimitation of so-called species.