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Darwin Correspondence Project

To Christian Gottfried Ehrenberg   18 November [1869]1

Down. | Beckenham | Kent. S.E.

Nov 18.

Dear Sir

I beg leave to thank you for the honour which you have done me in sending me your fine Memoir on the Bacillariæ of Mexico.2 With my best thanks & the most sincere respect

I beg leave to remain | yours truly obliged | Charles Darwin


The year is established by the publication date of Ehrenberg 1869 (see n. 2, below).
The reference is to Uber mächtige Gebirgs-Schichten vorherrschend aus mikroskopischen Bacillarien unter und bei der Stadt Mexiko (Ehrenberg 1869).


Thanks CGE for memoir on the Bacillariae of Mexico [Abh. K. Akad. Wiss. Berlin (Phys.) (1869): 1–66].

Please cite as

Darwin Correspondence Project, “Letter no. 6996,” accessed on 27 April 2018,

Also published in The Correspondence of Charles Darwin, vol. 17