skip to content

Darwin Correspondence Project

To J. S. Burdon Sanderson   27 May [1874]1

Down, | Beckenham, Kent.

May 27th

My dear Dr. Sanderson

Your information is invaluable to me. For Heaven sake do not apologise for delay, for it makes me feel more guilty in having given you such immense trouble. If all fibrous basis of bone is dissolved by artificial gastric juice, & if, as I understand all gluten & all fibrin is dissolved with the fatty acids & pepsin, the ferment of Drosera must differ considerably from pepsin.2

Yours very truly | Ch. Darwin


The year is established by the relationship between this letter and the letter from J. S. Burdon Sanderson, 26 May [1874].
See letter from J. S. Burdon Sanderson, 26 May [1874] and n. 3. CD was comparing the digestive secretions of Drosera (sundew) with those of an artificial animal stomach. For the results of the experiments on the fibrous basis of bone, see Insectivorous plants, pp. 108–9.


Insectivorous plants. By Charles Darwin. London: John Murray. 1875.


Thanks JSBS for his work. CD concludes the ferment of Drosera must differ from pepsin.

Please cite as

Darwin Correspondence Project, “Letter no. 9473,” accessed on 3 August 2021,

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