Darwin references a "capital" letter he has received from ARW following ARW's reading of On the Origin of Species.

Refers to Bates' admiration of ARW.

Darwin mentions that ARW will soon return from the Malay Archipelago.

ARW listed along with Hooker, Huxley, Lubbock and Bates as the "only honest downright "flat-footed" men in all England!!!".

Critical of ARW's understanding of the economy of nature.

References ARW's letter to Darwin of 2 Jan 1864 about Herbert Spencer.

Praises ARW.

Praises ARW's paper on Man.

Darwin suggests that a Royal Medal might be bestowed on ARW before too long.

Darwin remarks on his recommending ARW as a candidate for the Royal Society of London's Royal Medal.

Darwin compliments ARW's papers published in the Proceedings of the Zoological Society of London and in the Journal of the Royal Geographical Society on geographical distribution in the Malay Archipelago.

Darwin refers to ARW's "On the phenomena of variation and geographical distribution as illustrated by the Papilionidae of the Malayan region".

No summary available.

Darwin agrees with Hooker's comments about ARW in Hooker's letter of 6 Oct 1865. Hooker's letter he describes ARW as: "... not a man of large sympathies, nor very charitable I think, & is certainly awfully cold & dry at times; yet he is essentially large minded, & very able".

Darwin states he hopes ARW's paper on sexual modifications and adaptive mimicry in butterflies will be published.