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Darwin Correspondence Project

From John Tyndall   23 October [1875]1

Royal Institution

23rd Oct.

My dear Darwin

I am very much obliged to you for your note.2

I wonder if I send two or three other tubes down whether Mr Henry (he lives near you I believe) would kindly place them somewhere in the open and observe them for me?3

Trust me, your friends were delighted to see you so joyful on Sunday, and it is a doubled pleasure to learn that you have not suffered from the dissipation.4

Ever yours | John Tyndall

CD annotations

Top of letter: ‘Microscopical Journal | Proof-sheets’ pencil; ‘micro’ blue crayon del pencil


The year is established by the relationship between this letter and the letter to John Tyndall, 20 October [1875].
Mr Henry has not been identified. For more on Tyndall’s experiments, see the letter to John Tyndall, 20 October [1875] and n. 2.
According to Emma Darwin’s diary (DAR 242), Thomas Henry Huxley, Henrietta Anne Huxley, and Tyndall stayed at Down on the weekend of 16 and 17 October 1875.


Asks whether he may send two or three other tubes [of boiled infusions] to be placed in the open and observed for him.

Letter details

Letter no.
John Tyndall
Charles Robert Darwin
Sent from
Royal Institution
Source of text
DAR 106: C19
Physical description
1p †

Please cite as

Darwin Correspondence Project, “Letter no. 10218,” accessed on 17 April 2021,

Also published in The Correspondence of Charles Darwin, vol. 23