Campbell, John, 140 High Holborn, London, u (1774–1801). The house in High Holborn included ware rooms and workshops. From 1785 he maintained additional workshops at Dumbs Alley, Holborn. Other property owned by John Campbell included houses in Hart St, Bloomsbury and in 1793 a house, offices, stables and other buildings in Mile End Rd let to Abraham Hall and insured alone for £1,800. He was clearly a man of some considerable affluence for the total insurance cover on his properties amounted to £5,900 in 1790 and reached £6,200 two years later. By the early 1790s he was probably living at 2 Lyon St, Holborn. Subscribed to Sheraton's Drawing Book, 1793. Between 1783–86 he was employed at Carlton House and his bills amounted to £663 14s 9d. [D; GL, Sun MS vol. 255, p. 266; vol. 276, p. 604; vol. 293, p. 65; vol. 294, p. 302; vol. 329, p. 64; vol. 370, p. 278; vol. 386, p. 461; vol. 392, p. 230; H. Clifford Smith, Buckingham Palace]