Born at Saddleworth, in Yorkshire. After leaving Manchester Grammar School he entered Owens College in 1884. He was a brilliant student and took many class prizes, being noted for the methodical and orderly clearness of his notes of lectures. At the Infirmary he was remarkable among his fellow-students for his ability in arriving at a diagnosis. After qualifying he served as House Surgeon and Resident Surgical Officer. In 1900 he was elected Assistant Surgeon in succession to Tom Jones (qv), and in 1905 Surgeon in succession to Joseph Collier (qv). He was Lecturer on Practical Surgery, and among other posts he held at one time that of Surgical Officer at the Cancer Hospital; Resident Medical Officer at the Barnes Convalescent Hospital, Cheadle; Prosector and Demonstrator of Anatomy at Owens College; Joint-Editor of the *Manchester Medical Chronicle*; Consulting Surgeon to the Manchester Hospital for Consumption, and to the Warehousemen and Clerks' Orphan Schools. Having already served in the Volunteer Medical Staff Corps, he was commissioned Major in the RAMC (T) Reserve of Officers for the 2nd Western General Hospital. He was for years Secretary to the Manchester Medical Society, and recatalogued the periodicals in the Society's Library. He gained a large surgical practice at Northern Assurance Buildings, Albert Square, and at 191 High Street, Oxford Road, Manchester. He faced bravely two necessary operations, working in between, and almost to the last. He died at Manchester on August 3rd, 1910, and was buried at St Paul's, Kersal. He married in 1902 the daughter of T R Hook, of Kersal, who survived him with three young children. Quiet, unassuming, generous, courteous, and tolerant, Platt was a fine character. Among his recreations was stamp-collecting, and his rare British issues were specially remarkable. In November, 1910, Mrs Platt endowed a bed in one of the female wards of the Manchester Infirmary in memory of her husband.