Summary

Extended discussion of their respective difficulties with the definition and status of species and with the extent to which the theory of transmutation may be applied.

Has rediscovered S. S. Haldeman’s 1844 paper defending the transmutation theory with great skill.

Asks for reference to Geoffroy Saint-Hilaire’s first enunciation of the progressive development and transmutation theory.

Summary

Origin is finished.

Asks for names of foreign speculative naturalists.

Hopes THH will think he is on right road despite errors.

Summary

Has just finished Origin. CD has demonstrated a true cause for the production of species.

CD has loaded himself with unnecessary difficulty in adopting natura non facit saltum.

Summary

Murray has sold out Origin; wants a new edition immediately.

Asks THH to check whether Geoffroy de St Hilaire is correct [form of name].

Would be grateful for THH’s impressions on the truth of natural selection.

Summary

THH’s letter about the Origin makes CD feel like a Catholic who has received extreme unction. Can now sing nunc dimittis. Had determined to abide by judgment of Lyell, Hooker, and THH.

Problem of how variations arise at all troubles him also.

Summary

Rejoices over THH’s lecture ["On species and races, and their origin", 10 Feb 1860, Not. Proc. R. Inst. G. B. 3 (1858–62): 195–200] to be given at Royal Institution. Offers pigeon illustrations.

Adam Sedgwick has sent a "slashing" letter [2548] about Origin.

Summary

Sends references for materials useful for THH’s lecture.

Breeding and crossing. Pigeon fanciers.

Responses to Origin: A. C. Ramsay, Charles Kingsley, Quatrefages de Bréau.

Summary

Thanks for THH’s review of Origin in Macmillan’s Magazine ["Time and life: Mr Darwin’s Origin of Species", 1 (1859–60): 142–8]. Reception of natural selection will depend on whether it explains the recognised laws in the several fields of natural history.

Domestic variation.

Summary

Sends enclosure [unspecified].

Reminds THH to mention [German] translation [of Origin] when he writes to R. A. von Kölliker.

Summary

Sends anecdotes and drawings of pigeons for Royal Institution lecture. Offers parts on hybridisation and pigeons from his MS (if THH has patience to read them).

Has heard George Busk is converted.

Summary

Will bring materials for Royal Institution lecture [when he comes to London].

Plans to bring out separate detailed volumes [on his theory], starting with domestic variation.

Summary

Sends MS on pigeons for THH’s lecture at Royal Institution.

Summary

Henry Holland and others have attacked his reasoning from analogy to one primordial created form – by which CD means only that we know nothing of how life originated. The reasoning seems probable to him, so he has kept it in.

Summary

Delighted with Times review [26 Dec 1859]. Puzzled by author, suspects THH, but publication in Times makes it unlikely. Sorry for Owen.

Summary

Will keep THH’s secret [of authorship of Times review of Origin]. It has made deep impression.

J. D. Dana’s illness.

Daily News accuses him of plagiarising Vestiges.

Summary

Sends ticket to pigeon show.

A quotation from Erasmus Darwin’s Zoonomia [1794, 1796] shows that he anticipated Lamarck.

G. Grote impressed by Times review [26 Dec 1859, p. 8].

Summary

On the problem of want of sterility in crosses of domestic varieties. Refers to discussion in Origin, pp. 267–72 ["Fertility of varieties when crossed"]. We do not know precise cause of sterility in species.

Andrew Murray has attacked Origin [see 2647].

H. C. Watson objects to natural selection on grounds of limitless diversification of species.

Summary

Sends copy of 2d ed. of Origin, with list of corrections.

Is at work on "fuller work" [Variation].

Summary

THH’s efforts to obtain Copley Medal for CD fail. Thanks THH for kind words of sympathy.

Summary

Has arranged with Baily the poulterer for pigeons for THH to exhibit at Royal Institution lecture.

E. A. Darwin will subscribe to H. Spencer’s book [First principles: a system of philosophy (1862)].