sub-tropical colonies should be restricted to those with a certificate of qualification in tropical medicine. “I have called in a specialist of experience to prescribe,” Manson said, in relating the quotes. “I need hardly say I fully endorse his prescription.” When the British Medical Association formed a new sub-section devoted to tropical medicine the following year, Manson was made the president and Davidson was one of three vice-presidents. At a meeting of the sub-section in July 1898, both men presented papers on malaria. Then Manson would bring out his own text book, Tropical Diseases: A Manual of the Diseases of Warm Climates, which he stated was not being put forward as a “complete treatise” or comparable to “the more elaborate works” of Davidson and others. Nevertheless, Manson used his book to outline his theory – later proven to be correct - that malaria in humans was transmitted by mosquitoes. The following year, Manson became the founder of the London School of Hygiene and Tropical Medicine. A few months later, in May 1900, Davidson became Edinburgh University’s first lecturer in “diseases of tropical climates”. He remained at the university until his retirement in 1907, teaching students from Britain and across the world, including Africa, Asia and Australasia. Death and family On 13 January 1918, Andrew Davidson died at the home in Ilkley, Yorkshire of his daughter Flora (1867-1950), 16 days after the death there of Christina, his wife of 56 years. Andrew and Christina were survived by two sons and three daughters. They included John Stewart Davidson (1863-1945), who had joined the Army Medical Corps in 1886, and David Macdonald Davidson (1865-1927), who had joined the Indian Medical Service in 1888. He would be Surgeon-General in the IMS when he co-authored a chapter on dysentery in their father’s 1893 tropical diseases book. One of the two children who predeceased Andrew and Christina was Mary Cameron Davidson (1871-1905), would become a trained nurse before joining the Indian Medical Service. She and her two sons drowned in the SS Hilda steamship disaster off the coast of France in 1905. The son who Andrew and Christina named after his great friend and mentor, William Burns Thomson Davidson (1864-1914), predeceased them in Ceylon (now Sri Lanka), where he had gone to live as a tea planter. Before their deaths in 1918, however, Andrew and Christina would learn that William’s eldest daughter, Alice Muriel Davidson (1900-1988),