William Chadwell Mylne

William Chadwell Mylne, FRS (6 April 1781 – 25 December 1863) was an English civil engineer and architect. He was descended from a Scottish family of masons and architects, and was the second son of Robert Mylne (1733–1811), surveyor to the New River Company, and builder of the first Blackfriars Bridge in London. Career Initially, William's elder brother Robert was intended to take over his father's business, but when Robert opted for a military career, William began to assist his father, surveying land for the Eau Brink Cut, on the River Great Ouse, in 1797. He also undertook work on the Gloucester and Berkeley Canal. In 1804, Mylne was employed by the New River Company as assistant to his father, and upon his father's retirement in November 1810, he became chief engineer of the Company, a post he held until 1861. From 1819 he was engaged in laying out residential streets on the New River Company's property at New River Head in Clerkenwell, including Myddelton Square, Amwell Street, Inglebert Street, and River Street. Mylne later designed the gothic St Mark's Church, Myddelton Square (1826–1828), and Clerkenwell Parochial Charity Schools (1828).