Lewis was educated at Repton and Caius College, Cambridge; and at St George's Hospital, London, where is he qualified B.A., M.B., B.C. (Camb) in 1895. After doing post graduate work at Vienna and filling a surgeoncy at the Paddington Green Children's Hospital he settled in practice at Radford, Nottingham. Lewis obtained a commission in the R.A.M.C. (T.F.) and joined the Notts and Derby Mounted Brigade Field Ambulance on 22nd October 1914. He was promoted to captain after a year’s service. He was known to have been a keen paleontologist, deeply interested in the fossil yield of the coalfields amid which he lived. Shortly before he died he generously handed over his collection of plant remains to Cambridge University and his animal fossils to the Geological Survey. Lewis’s MIC states he entered the war in 1917 serving with a hospital ship. He was onboard H.M.H.S. “Glenart Castle” when the ship was torpedoed and sank. He was the younger son of John Moysey of Guildford; and the husband of Amy Frances - the sister of Dr J Noble of Nottingham.