Mentions English scientists who support mutability of species.

Asks QdeB whether he could help locate a French translator and publisher.

Discuss CL’s suggestions for revisions to the chapter on the geological record [Origin, ch. 9].

Henry Holland’s reaction to the book.

Comments on CL’s work on flint tools of early men.

Describes at length a conversation with Owen concerning Origin. Notes "that at bottom he goes immense way with us", but emphasises Owen’s unfriendly manner. Remarks that Owen accepted a relationship between bears and whales. "By Jove I believe he thinks a sort of Bear was the grandpapa of Whales!"

Has heard Herschel considered his book "the law of higgledy-piggledy".

Urges appointment of Edward Blyth as naturalist on an expedition to China.

Comments on Hooker’s introductory essay [in Flora Tasmaniae].

Cites C. V. Naudin’s article ["Considérations philosophiques sur l’espèce et la variété", Rev. Hortic. 4th ser. 1 (1852): 102–9].

Mentions letter from William Jardine criticising discussion of the Galapagos in the Origin.

Mentions William Clift ["Report in regard to the fossil bones found in New Holland", Edinburgh New Philos. J. 10 (1830–1): 394–6].

Discusses relations between fossil and living types.

Discusses Hooker’s introductory essay [in Flora Tasmaniae]. Criticises Hooker’s views on flora of rising and sinking islands.

Encloses letter concerning Edward Blyth’s application for a position with the China expedition.

Mentions reviews of the Origin. Guesses that Huxley wrote the Times review.

Alludes to discussion of relations between fossil and modern types [in Principles of geology 3: 144].

Discusses destruction of tropical forms in the glacial period.

Mentions letter from Dana concerning Dana’s illness.

No summary available.

CL’s comments on Origin. Mentions corrections to last chapter suggested by CL.

Comments on lack of peculiar bird species on Madeira and Bermuda. Emphasises importance of American types in Galapagos.

Denies necessity of continued creation of primitive "Monads".

Denies need for new powers and any principle of improvement.

Discusses gradations of intellectual powers.

Adaptive inferiority and extinction of groups of species and genera.

Asserts that climate is less important than the struggle with other organisms.

Suggests an experiment involving primroses and cowslips.

The chapter on hybridisation.

Rudimentary organs.

Gives opinion of Lamarck’s work.