Letter from [John] Davy, London, to the Royal Society In response to comments made by the Committee on his paper on the structure of the heart of the genus Anura, in particular on frogs and toads. Davy references Sir Everard Home's paper on the circulation of the blood in the class Vermes. The letter is additionally addressed to Sir Humphry Davy 'in his absence to the Council'. 18 January 1827