Arthur was educated at Highgate School and entered St. Bartholomews Hosptial as a student in 1899 and obtained the diplomas of M.R.C.S. (Eng.), L.R.C.P. (Lond.) in 1907. Soon afterwards he became house surgeon at the Huntingdon County Hospital, and later surgeon on board the British India Mail Steamship 'Jelunga'. In 1909 he entered into partnership at Singleton in Monmouth with Dr Lloyd G Smith and was appointed honourary medical officer to the Monmouth Hospital in the same year. He married Louise, daughter of John Macmin, and left two children. When war was declared he offered his services to the War Office. He joined the R.A.M.C., and was gazetted temporary Lieutenant on the 18th August. After a short period at Woolwich he was sent abroad to join the Expeditionary Force, and was one of the first medical men to lose his life for his country. In his outline of the operations of No 4 Field Ambulance, Lt/Col Faulkner wrote "I now received orders to proceed towards Viel-Arcy and establish a temporary station at the point L`Hopital under Lt Nelson and proceed with the waggons to a point immediately south of the canal bridge at Pont-Darcy... The men commenced to prepare their breakfasts and shortly afterwards a section of artilly limbers came over the canal bridge and passed up towards Viel-Arcy. Scarcely had they done so when the enemy opened fire on us with their large howitzer guns.... Owing to the continued fire I ordered the waggons into the temporary hospital established nearby in order to evacuate the wounded there into a place of safety with all possible speed. Meanwhile I proceeded towards the canal bridge with the stretcher bearers and removed several casualties that were lying about the vicinity of the bridge. We also found the body of Lieutenant Armstrong RAMC who had been killed instantly by a large shell wound of the head." Arthur was the only son of Mr and Mrs Henry Armstrong of 42 Dartmouth Park Road. London. N.W.