skip to content

Darwin Correspondence Project

From J. S. Burdon Sanderson   3 September [1874]1

49 Queen Anne St

Sept. 3

Dear Mr Darwin,

I must simply ask you to forgive me for delay in replying to your last letter.2

I am still unable to answer the question and must ask for more time.

I find I have no note of any experiments with the fatty acids as to the digestion of gluten. As soon as the Laboratory is in order I will make some.3

We found before that although gluten was digested very slowly it was digested entirely with Pepsine & Hydrochloric acid.

Very truly yours | J B Sanderson

CD annotations

1.1 I must … time. 2.1] crossed red crayon


The year is established by the relationship between this letter and the letter to J. S. Burdon Sanderson, 21 August [1874].
See letter to J. S. Burdon Sanderson, 21 August [1874] and n. 3. Burdon Sanderson was director of the Brown Animal Sanatory Institution.


Will prepare experiments with the fatty acids on digestion of gluten. Has found it is digested slowly, but entirely, with pepsin and hydrochloric acid.

Letter details

Letter no.
John Scott Burdon Sanderson, 1st baronet
Charles Robert Darwin
Sent from
London, Queen Anne St, 49
Source of text
DAR 58.1: 146
Physical description
ALS 2pp †

Please cite as

Darwin Correspondence Project, “Letter no. 9623,” accessed on 25 March 2023,

Also published in The Correspondence of Charles Darwin, vol. 22