George Sylvan De Wilde [also known as George Sylvan Dewilde] was born in Wandsworth, Surrey [now London] 1863 and trained in the office of Frederick William Peel (?-1910) in London from 1891 to 1898. He subsequently worked as an assistant to Edward Monson (1872-1941) and Henry Castle Hiett Monson (1877-1961) of Monson & Sons from 1898 to 1910.
De Wilde commenced independent practice in Hammersmith, London in 1896 [presumably whilst still working for Peel and Monson]. He was elected a Licentiate of the Royal Institute of British Architects (LRIBA) in 1911. The address of his business was given as 5 St. Peter's Square, Hammersmith, London in 1911 and 1914; 77 Belgrave Road, Westminster, London in 1923; and 38, St. George's Square, Westminster, London in 1926. He died in 1946.
"Scacot", Angmering-on-Sea, Sussex; two houses at Chaldon, Surrey, 1924; "Fourways", Walton-on-Thames, 1924.
Directory of British Architects 1834-1914. Compiled by Antonia Brodie, et al. Volume 1: A-K. London; New York: British Architectural Library, Royal Institute of British Architects/Continuum, 2001