subsequently eclipsed Nash and emerged as the primary influence of the design of Carlton House Terrace, where he exclusively designed No. 3 and No. 4. London Legacy James Burton's imperative contribution to the development of the West End is acknowledged increasingly since the 20th century: including by Baines, John Summerson, Olsen, and Dana Arnold. Steen Eiler Rasmussen, in London: The Unique City, commended Burton's buildings, but did not identify their architect. The Oxford Dictionary of National Biography contends that Burton were 'the most successful developer in late Georgian London, responsible for some of its most characteristic architecture', and the Burtons' St. Leonards Society'' that he were "probably the most significant builder of Georgian London". Gunpowder manufacturer James Burton, from 1811, invested in the manufacture of gunpowder at Powder Mills, Leigh that was managed by Burton and his eldest son, William Ford, who directed sales of the product from his office in the City of London. The mills, which were initially known as the Ramhurst Powder Mills, and later as the Tunbridge Gunpowder Works, were that established in 1811 in partnership with Sir Humphry Davy, who later sold his shares to the Burtons, who thereby became the sole owners of the Works. After the retirement of James Burton in 1824, William Ford became the sole owner of the mills until his death in 1856, at which point the gunpowder business to his brother, Alfred Burton Mayor, of Hastings. Development of St Leonards-on-Sea In 1827, James Burton realised that the ancient Manor of Gensing, which was situated between Hastings and the Bulverhythe Marshes, could be developed. Decimus Burton advised against this prospective project of his father, which limited his supply of capital for his own development of the Calverley Estate, but James ignored him, bought it, and proceeded to build St Leonards-on-Sea as a pleasure resort for the gentry. James Burton designed the town 'on the twin principles of classical formality and picturesque irregularity', to rival Brighton. The majority of the first part of the town had been completed by 1830. In 1833, St. Leonards-on-Sea was described as 'a conceited Italian town'. Family homes During 1800, in which his tenth child Decimus was born, James was living at the 'very comfortable and well staffed' North House in the newly built Southampton Terrace at Bloomsbury. He subsequently lived at Tavistock House, which later became the residence of Charles Dickens. Subsequent to the birth