Letter from Archibald Vivian Hill, on a paper 'The initiation of nerve impulses by mesenteric Pacinian corpuscles' by John Archibald Browne Gray and J L Malcolm to D C Martin, Assistant Secretary of the Royal Society The paper is greatly improved and reading it 'no longer drove [him] to sleep'. It should still be read twice to be properly intelligible. [Published in Proceedings of the Royal Society B, 1950]. Endorsed on recto as received 9 August 1949. 8 August 1949