Royal Society Fellowship election certificate for Charles Darwin

The citation reads: "Charles Darwin Esq MA of Christ's College Cambridge, a gentleman who volunteered as a naturalist to accompany Captain Fitz Roy in the Beagle in his surveys in South America & the Pacific Ocean & who is well acquainted with geology, botany, zoology & many other branches of Natural Knowledge, being desirous of becoming a Fellow of the Royal Society of London, we whose names are subscribed do, of our personal knowledge recommend him as a proper person to become a Fellow therof & as likely to prove a useful & valuable member.