Born in Liverpool in 1877, the son of Edmund Brown Ewart, BA, and was educated at Liverpool Institute and University, where he won high distinctions as a student, being Holt Tutorial Scholar, Junior Lyon Jones Scholar, 1894-1896, and Hon Fellow in Pathology at University College, Liverpool. After holding an appointment as Senior House Surgeon at the Royal Infirmary, Liverpool, he gained his public health experience at Ashton-under-Lyne, going on to Middlesbrough as Assistant Medical Officer of Health. He was appointed Medical Officer of Health to the Urban District of Barking, where he was also School Medical Officer and Superintendent of the Isolation Hospital. He showed himself a very active and diligent public health officer, interested both in the preventive and epidemiological side of his work, with a philosophical bias which produced such essays as "Time and the Second Generation" and "Parental Age and Offspring". Ewart lost no opportunity of dwelling upon the importance of the food of the people to the public health, and saw in disease a pathological reaction due to faulty metabolism. No subject was too difficult for him to tackle, and even with imperfect data his originality of mind was able to elaborate the problems before him. Ewart, who resided at The Cottage, Upney, Barking, died in June, 1923, following an operation at the West Ham Hospital. Publications: "Venesection: its Indications from a Physiological Standpoint." - *Manchester Med. Chron.*, 1905, ser. Iv, 67. "Action of Aortic Valves in Health and Disease." - *Lancet*, 1904, ii, 1492. "Some Features of Sewage Pollution of an Estuary." - *Public Health*, 1909, xxiii, 51. "Variations in the Chemical and Bacteriological Compositions of Water considered from a Statistical Point of View." - *Ibid.*, 1910-11, xxiv, 10. "Parental Age and Offspring." - *Eugenics Rev.*, 1910. *A Cause of the Fall of the Death-rate from Phthisis*, 1912. In the *Journal of Hygiene* Ewart also published a series of valuable papers dealing with the statistics of scarlet fever and diphtheria.