Born at Montreal, son of James P Clark, merchant, and Jane R his wife. Educated at Merchant Taylors' School from 1877-1883, when he matriculated at Cambridge from Cavendish College. He graduated BA with 2nd class honours in the Natural Science Tripos, Part I, in 1886, but did not take a medical degree at the university. He was for some years a schoolmaster at Skipton and Cranleigh, where his deeply religious convictions must have exercised an influence for good over his pupils. He then entered St Bartholomew's Hospital and was successively House Surgeon, Midwifery Assistant, and Assistant Demonstrator of Physiology. He practised for a short time at North Road, Surbiton, and when the South African War broke out in 1899 he volunteered as a Civil Surgeon. He settled at 6 Nicolas Street, Chester, on his return to England, but went back to South Africa in 1903 or 1904 to act as Resident Surgeon at the Buluwayo Memorial Hospital. Here he held the posts of Medical Officer of Health to the Buluwayo Municipality, Director of the Pasteur Institute of Rhodesia, and Medical Officer of the Rhodesian Labour Bureau. He built up for himself a good practice and was in partnership with John Henry Dyke Acland. He died at Buluwayo on January 23rd, 1916, being survived by his widow.