To ? 25 November [1861–8]1
Down. | Bromley. | Kent. S.E.
I have just read your notice on bent cleavage;2 & it has occurred to me that you might possibly like to hear that I observed the same fact in Chili. You will find a brief notice of this subject in my Geological Observations on South America 1846 footnote page 160.3 In case you thought it worth while to refer to the passage, you will find a copy of this book at the Geolog. Soc.4 I have suggested as a conjectural explanation the action of earthquakes. I presume that in a district lying for instance south of a volcanic focus the vibrations wd travel across the country in a nearly regular manner.
Pray do not trouble yourself to acknowledge the receipt of this as I do not know whether it is worth sending, & I beg leave to remain, dear Sir, | yours faithfully | Charles Darwin
Has read correspondent’s notice on bent cleavage. Refers him to observations on the same fact in South America, p. 160. CD has also suggested a conjectural explanation.
Please cite as
Darwin Correspondence Project, “Letter no. 13881,” accessed on 21 February 2017, http://www.darwinproject.ac.uk/DCP-LETT-13881