Geological Society of London | Somerset House.
23rd May 1839
Sir
I am requested by the Geological Society to express their thanks for the Proceedings of the American Philosophical Society vol 1 No. 6 and to assure you that the Society are much honored by this mark of consideration
I have the honor to be | Sir | Your most obedient | and very humble Servant | Charles Darwin | Secretary To | The Secretary of | The American Philos. Soc.
Please cite as “DCP-LETT-511,” in Ɛpsilon: The Charles Darwin Collection accessed on