In the 1780s there was fresh concern over security, quality and economy of supply. The deputy comptroller of the Royal Laboratory at Woolwich, Major, later Lieutenant General, Sir William Congreve advocated that the Waltham Abbey Mills should be purchased by the Crown to ensure secure supplies and to establish what would now be called a centre of excellence for development of manufacturing processes and to establish quality and cost standards by which private contractors could be judged. In October 1787 the Crown purchased the mills from John Walton for £10,000, starting a 204-year ownership. Congreve was a man of immense drive and vision, a pioneer of careful management, quality control and the application of the scientific method. Under his regime manufacture moved from what had been a black art to, in the context of its day, an advanced technology.