Informs CD that Sylvicola aureola may be a distinct species but is a close ally of S. aestiva of N. and S. America and perhaps only a "climatic variety".

Encloses letters from H. G. Bronn, Asa Gray, and C. J. F. Bunbury, concerning the Origin.

Will send review by Gray and a notice by Bronn.

Says Bronn will superintend the German translation.

Comments on lecture by Huxley [at Royal Institution, 10 Feb 1860, Not. Proc. R. Inst. G. B. 3 (1858–62): 195–200]. Has remonstrated with him for saying sterility is "a universal and infallible criterion of species".

Discusses phases of climate.

Describes fossil mammals discovered by Auguste Bravard in South America.

Has had argument with Bishop of Oxford [Samuel Wilberforce] about CD’s book [Origin].

Discusses review in Annals and Magazine of Natural History. Guesses that T. V. Wollaston is the author.

Discusses evidence of shells on Madeira.

Comments on paper by Wallace ["On the zoological geography of the Malay Archipelago", J. Proc. Linn. Soc. Lond. (Zool.) 4 (1860): 172–84].

Thanks PLS for information about variation in birds. Asks for more information.

Huxley’s Royal Institution lecture on Origin [10 Feb 1860, Not. Proc. R. Inst. G. B. 3 (1858–62): 195–200] an "entire failure" as an exposition of CD’s doctrine.

R. I. Murchison very civil.

CD counts Lyell among the converted.

Questions how natural selection can explain why some cells remain simple and others are modified into highly complex structures.

Reports on the spread in Ceylon of a recently introduced plant.

Thanks HGB for agreeing to superintend translation of Origin.

Comments on HGB’s review.

Encloses corrections and preface for Schweizerbart. Discusses translation of term "natural selection".

Discusses meaning of various English scientific terms.

Is much pleased that translation [of Origin, 1st German ed.] will be ready by May.

Auguste Bravard’s discoveries magnificent.

Bravard has sent pamphlets [Observaciones geológicas (1857) and Monografia de los terrenos marinos terciarios (1858)] with strange doctrine that Pampean deposit is subaerial.

Review of Origin by Wollaston [Ann. & Mag. Nat. Hist. 3d ser. 5 (1860): 132–43] clever and misinterprets CD only in a few places.

Wallace’s MS ["Zoological geography of the Malay Archipelago", J. Proc. Linn. Soc. Lond. (Zool.) 4 (1860): 172–84] admirably good.

Henslow "will go very little way with us". "He, also, shudders at the eye!"

Baden Powell says CD’s statement about eye is conclusive.

Leonard Jenyns cannot go as far as CD, yet cannot give good reason.

Sends historical preface and corrections for American edition of Origin;

would have liked AG’s review [Am. J. Sci. 2d ser. 29 (1860): 153–84] at the head.

Agrees with AG’s assessment of weak points.

Arranges to send ear-trumpet to Syms Covington.

Encloses reviews by Asa Gray and Bronn. Comments on Bronn review. Mentions review by Wollaston.

Comments on paper by W. H. Harvey in Gardeners’ Chronicle [(1860): 145–6]. Discusses Harvey’s belief in the permanence of monsters.

Discusses CL’s objection that still-living primitive forms failed to develop.

The survival of Lepidosiren and other primitive types of fish and mammals.

Thinks AG’s review is admirable.

Reactions of others to the Origin.

Believes Origin makes science "young, clear, elevated" but does not have the facts to prove that cumulated slight modifications could ever produce different families from common ancestors. [See 2709.]

Comments on W. H. Harvey’s article on a monstrous Begonia [Gard. Chron. 18 Feb 1860].

Is astonished at being attacked for not allowing great and abrupt variations under nature. More evidence needed to make CD admit that forms have often changed "by saltum".

Arrangements for the American edition of Origin.

ACR has for years had a belief in mutability and transmutation of species, prompted by disputes over the nature of species and varieties, and the existence of representative species in space and in the geological record. Could not accept a Creator employing small miracles to make species differ just a little between formations. Has maintained that one would not expect to find fine gradations between forms in the fossil record, but only representatives of very populous forms. [See 2711.]

CD has caused a great change in HS’s views, in showing how a great proportion of adaptation should be explained by natural selection not direct adaptation to changing conditions. HS had remarked on the survival of the best individuals as a cause of improvement in man, but he "& every one" overlooked selection of spontaneous variation. Believes so many kinds of indirect evidence must add up to a conclusive demonstration of the doctrine.

Gradation in the eye.

Hooker intends to reply [to W. H. Harvey’s article in Gard. Chron. (1860): 145–6].

Discusses Aspicarpa with respect to correlation.

Comments on monstrous animals.

Discusses objections of Bronn and Asa Gray to natural selection. Cites parallel between natural selection and Newton’s concept of gravitation.

Mentions German experiments on spontaneous generation.

Too ill to go to club.