Born on 16 February 1869 at Eccles, near Manchester, the first child of Thomas Clegg, agent, and Elizabeth Gray, his wife. He was educated at Manchester Grammar School and at the Victoria University where he graduated MB with honours in 1893, having taken the Conjoint qualification in 1891. Transferring to London he was university scholar and gold medallist in forensic medicine, and took first-class honours in obstetric medicine at the MB examination in 1893. He served as house surgeon at Manchester Royal Infirmary and collaborated with Alexander Wilson, FRCS in a descriptive catalogue of the pathological museum. In 1894 he took both the London M.D. and the Fellowship, and decided to specialize in ophthalmology. He then served as house surgeon at the Manchester Royal Eye Hospital, where he was subsequently surgeon. In 1918 he was elected ophthalmic surgeon to the Royal Infirmary, retiring, from ill-health, in 1924, though he continued his connexion with the Eye Hospital and his private practice at 22 St John Street. He was lecturer in ophthalmology at Manchester University. Clegg was a founder and sometime president of the North of England Ophthalmological Society, president of the section of ophthalmology at the British Medical Association Manchester meeting in 1929, and president of the Manchester Medical Society. He was a regular attendant at scientific meetings at home and abroad, and frequently contributed to professional journals both here and in America. He left Manchester for London in 1933, but went back from time to time to see patients, until his retirement in 1938. Clegg was a good operator and an excellent teacher, always ready to try new methods. He was a pioneer in the treatment of glaucoma, and an early advocate of orthoptic training for squint. He studied central scotoma in anterior uveitis, and detachment of the choroid as a postoperative complication in trephined eyes. He invented a retro-ocular trans-illumination lamp for studying detachment of the retina and for the detection of intro-ocular tumours. Gray Clegg married on 10 February 1926 Edith Anna Nightingale, who survived him, but without children. He died on 23 December 1941. He was a prominent Wesleyan Methodist, and was interested in social welfare work, particularly among students. A tall man of great energy and activity, he was a life-long teetotaller and never smoked. Publications:- 250 trephinings of the sclerocomeal junction for hypertony. *Trans Ophthal Soc UK* 1917, 37, 308. Clegg frequently contributed case-reports and joined in discussions at the Ophthalmological Society; his articles occur in almost every volume of the *Transactions* throughout his active career.