To Charles Loring Brace   24 June [1863]1

Down. | Bromley. | Kent. S.E.

June 24th

Dear Sir

I am very much obliged to you for your kindness in sending me a copy of your new work on the “Races of the Old World”.2 I have not had time to read it all, but have looked through the latter part with interest. Your work must have been very laborious & I hope it will prove satisfactory.

I was interested by your remarks p. 388 on correlation of colour & constitution.3 I have long thought this view probable; & you will be glad to hear, that about a year ago, with the assistance of the Director General of the medical department of the British army I circulated printed questions to the Surgeons of all Regiments serving in Tropical countries, asking them to tabulate the proportion of men who suffer from Tropical diseases in relation to the colour of their hair & skin.4

Whether I shall get any reliable data is of course very doubtful.—5

With my best thanks I beg leave to remain | Dear Sir | Yours very faithfully | Ch. Darwin

1
The year is established by the reference to Brace 1863 (see n. 2, below).
2
There is a presentation copy of Brace 1863 in the Darwin Library–Down (see Marginalia 1: 68).
3
CD discussed the correlation of skin and hair with ‘constitutional peculiarities’ in Descent 1: 242–5; however, Brace’s book is not mentioned.
4
See Correspondence vol. 10, letter from George Busk, 1 April 1862, and letters from E. A. Parkes, 8 April 1862, 28 April 1862, and 29 June 1862. No copy of the printed memorandum has been found (see Freeman 1977, pp. 111–12); however, the text is given in Descent 1: 244–5 n. 48.
5
In Descent 1: 244 n. 48, CD reported that he had received no returns in response to his memorandum.

Manuscript Alterations and Comments

1.3 but] ‘b’ over ‘&’
2.2 be] after del ‘per’
2.4 of the] before omitted point

Please cite as “DCP-LETT-4220,” in Ɛpsilon: The Charles Darwin Collection accessed on 5 June 2025, https://epsilon.ac.uk/view/dcp-data/letters/DCP-LETT-4220