Dear Sir—
My observations on the geology of S. Africa have no value. They relate only to the junction between the clay-slate & the granite.— They were published at the end of my “Geolog. Observations on Volcanic Islands”.—1 I do not possess any duplicate copy.—
Yours faithfully | Ch. Darwin
Down, Beckenham, Kent
Feb. 16th—
Please cite as “DCP-LETT-13690,” in Ɛpsilon: The Charles Darwin Collection accessed on