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.

Please cite as “DCP-LETT-9623,” in Ɛpsilon: The Charles Darwin Collection accessed on 5 June 2025, https://epsilon.ac.uk/view/dcp-data/letters/DCP-LETT-9623