as the removal and burning of crops material that may harbour pupating pests. He published Indian Insect Life, a summary of the major insects of economic importance in 1906, in association with Frank Milburn Howlett. On 10 November 1910 their son Denis Charles died, possibly from typhoid, dysentery or some other fly-borne disease and the other son Cecil was immediately sent away to safety in Darjeeling to be taken care of at the Loreto Convent. The death led to his taking leave and returning to England the next year. His son Cecil was also accompanied by his Indian ayah Elizabeth. He took privilege leave from January 1911 for three months and then extended it by going on furlough. Among his last works in India was an analysis of the role of birds in agriculture, written along with supernumerary entomologist Charles W. Mason. The study, begun in 1907, involved analysis of the gut contents of 1325 specimens of birds shot in agricultural fields. He gave lectures in England and he was appointed a lecturer at the Imperial College on 1 September 1911. He applied for resignation from his Indian government posting. He returned to Pusa on 29 July 1912 and an offer was made to retain him but he decided instead to take up a position at the Imperial College as professor of entomology. His resignation was formally accepted on 15 December 1912. England Maxwell-Lefroy moved to live initially in Strawberry Hill, and later Acton Lodge in Isleworth close to his workplace in South Kensington. In the early days, he used a motorbike with a sidecar to travel about. In 1913-1914, Lefroy was consulted by Frank Baines, Principal Architect of the Office of Works, to study ways of exterminating death watch beetles that had been found in Westminster Hall, beside England's Houses of Parliament. He began to try out various chemicals and finally came up with a 50% dichlorobenzene, 47% mineral oil and 3% barium oleate mixture to brush the wood with. This treatment was used by Baines who was then knighted for saving Westminster Hall. He also designed a field trap for turnip flea beetles (Phyllotreta consobrina) which disturbed the beetles and trapped them on sticky surfaces. During the First World War, Maxwell-Lefroy volunteered but was rejected on medical grounds from military service. In 1915 he took up a position travelling across India as Imperial silk specialist. Along with E.C.