the Seven Years' War, fears of a land attack led to defensive 'lines' being built around the dockyard towns, and infantry barracks were established within them (e.g. at Chatham, Upper and Lower Barracks, 1756, and Plymouth, six defensible square barracks, 1758–63). The newly constituted Royal Marines were also provided with accommodation in the vicinity of the Dockyards (e.g. Stonehouse Barracks, 1779) becoming the first Corps in Britain to be fully provided with its own accommodation. Large urban barracks were still a rarity, though. In London there was a fair amount of barrack accommodation, but most of it was within the precincts of various royal palaces (as at Horse Guards, 1753). The prominent Royal Artillery Barracks in Woolwich (1776) was one exception (but significantly the Artillery were under the command of the Board of Ordnance rather than of the Army). In the aftermath of the French Revolution, though, things changed. The size of the army grew from 40,000 to 225,000 between 1790 and 1814 (with the Militia adding a further 100,000). Barrack accommodation at the time was provided for a mere 20,000. To deal with the situation, responsibility for building barracks was transferred in 1792 from the Board of Ordnance to a specialist Barracks Department overseen by the War Office. With a view to dealing with sedition, and perhaps quelling thoughts of revolution, several large cavalry barracks were built in the 1790s: first at Knightsbridge (close to the royal palaces), then in several provincial towns and cities: Birmingham, Coventry, Manchester, Norwich, Nottingham and Sheffield (as well as Hounslow Barracks just west of London). Several smaller cavalry and artillery barracks were established around this time, but very little was built for the infantry; instead, a number of large camps (with wooden huts) were set up, including at Chelmsford, Colchester and Sunderland, as well as at various locations along the south coast. Barrack-masters were appointed, one such was Captain George Manby at the Royal Barracks, Great Yarmouth. Coincidentally his father, Captain Matthew Manby, had been barrack-master at Limerick. It was not until some years after the end of the Napoleonic Wars (and post-war recession) that barrack-building began again. John Nash built four as part of his London improvements: Regent's Park and St John's Wood for the Cavalry, Wellington Barracks for the Guards, and St George's Barracks (since demolished) behind the National Gallery. In several instances elsewhere, buildings were converted rather than newly built