To T. H. Huxley   15 October [1859]1

Wells Terrace | Ilkley | Otley | Yorkshire

Oct 15th

My dear Huxley

I am here hydropathising & coming to life again after having finished my accursed book, which would have been easy work to anyone else, but half killed me.— I have thought you could give me one bit of information, & I knew not to whom else to apply, viz the addresses of

Barrande2

Von Siebold3

Keyserling. (I daresay Sir Roderick would know latter)4

Can you tell me of any good & speculative foreigners to whom it would be worth while to send copies of my Book “on origin of species”. I doubt whether it is worth sending to Siebold. I shd like to send a few about; but how many I can afford I know not yet till I hear what price Murray affixes.

I need not say that I will send of course one to you, in first week of November.— I hope to send copies abroad immediately.

I shall be intensely curious to hear what effect the Book produces on you. I know that there will be much in it, which you will object to; & I do not doubt many errors. I am very far from expecting to convert you to many of my herisies; but if on the whole, you & two or three others think I am on the right road, I shall not care what the mob of naturalists think. The penultimate chapter, though I believe it includes the truth, will I much fear make you savage.5 Do not act & say like Macleay versus Fleming “I write with aqua fortis to bite into brass.”6

Ever yours | C. Darwin

1
Dated by CD’s visit to Ilkley Wells hydropathic establishment, 4 October–7 December 1859 (‘Journal’; Correspondence vol. 7, Appendix II).
2
Joachim Barrande’s palaeontological work was much discussed by Charles Lyell and other British geologists. CD cited his views on Silurian fossils and the affinities of ancient species in Origin. Barrande’s name appears on CD’s presentation list (see Correspondence vol. 8, Appendix III).
3
CD was familiar with several of Karl Theodor Ernst von Siebold’s works. A copy of the French translation of his textbook on the comparative anatomy of invertebrates is in the Darwin Library CUL, as is the English translation of his important work on parthenogenesis (Siebold 1857), which CD had read soon after publication (Correspondence vol. 6). Siebold’s name appears on CD’s presentation list (see Correspondence vol. 8, Appendix III).
4
Roderick Impey Murchison had travelled with Alexandr Andreevich Keyserling in the Urals in 1844. CD sent Keyserling a copy of Origin and received a letter in reply (see Correspondence vol. 8, letter to Charles Lyell, 4 May [1860]); his name appears on the presentation list (see Correspondence vol. 8, Appendix III).
5
CD refers to the chapter entitled ‘Mutual affinities of organic beings: morphology: embryology: rudimentary organs’. Huxley had, up to that time, espoused the idea of an archetype to explain the classificatory relations between organisms (see di Gregorio 1984).
6
The acrimonious debate between John Fleming and William Sharp Macleay concerning the philosophy of classification was carried on in various scientific journals in 1839 and 1840. CD read all the papers involved (Correspondence vol. 4, Appendix IV, 119: 1a and 10a) and commented on the controversy in his Notebook C (Notebooks).

Manuscript Alterations and Comments

1.1 coming] before omitted point
2.2 I doubt … Siebold. 2.3] added
4.2 to;] semicolon over colon

Please cite as “DCP-LETT-2505,” in Ɛpsilon: The Charles Darwin Collection accessed on 5 June 2025, https://epsilon.ac.uk/view/dcp-data/letters/DCP-LETT-2505