Ian was educated at St. Paul’s School and Downing College, Cambridge, and took his B.A. (Natural Science Tripos) in 1910, and his M.A. in 1914. After a year’s study in medicine at the University of Edinburgh, he entered the London Hospital in 1911, and qualified M.R.C.S., L.R.C.P. in July 1914. He had intended to present himself for the final examination in medicine at Cambridge in the December that year, but immediately war was declared he volunteered his services, and was given a temporary commission in the R.A.M.C. After serving a while in Aldershot, Ian was sent to Gallipoli in June 1915, but was invalided home in the August. From then up until the middle of September he held various regimental and hospital posts at Cosham, Winchester, and other centres of the Southern Command. Afterwards he was sent to the Western Front, where he acted as Surgeon, first to the New Zealand Division, and subsequently to the 190th Brigade R.F.A. He was killed whilst attending to the sick and wounded under shell-fire. A gunner wrote to Ian’s family:- “At the time he received his mortal wound he was returning from ‘D’ Battery after visiting the sick men, to whom he devoted all his time. The loss of the captain is very deeply felt by all the boys of the brigade, with whom he was so very popular.” Ian’s colonel wrote:- “We are so very sorry to lose him as we liked him so much, and he was such a good man at his profession, and it’s very great loss to us.” Also a brother officer wrote:- “I cannot tell you how sorry I am, but you must bear it as bravely as he lived out here.” Ian was the the younger son of Dr. Macdonald Brown and Caroline Helen Macdonald Brown of 64 Upper Berkeley Street, London, W.1.; and the husband of Dora Macdonald Brown - they had one infant son.