disused Whiteworks tin mine, about 2 miles or 3 km to the south-east, which overlooks Fox Tor Mires, the presumed site of the Grimpen Mire to be found in Arthur Conan Doyle's tale The Hound of the Baskervilles. Conan Doyle stayed at the former Duchy Hotel whilst writing and researching the story with his friend, Bertram Fletcher Robinson. The hotel has long since closed and the building now houses the National Park Visitor Centre which is an all-weather centre and activity hub, with interactive displays, films, exhibitions and a children's discovery area. Other points of interest in the village include the prison museum which was formerly the prison dairy and behind the prison, two cemeteries - one for French prisoners of war and the other for American prisoners of war who died in the prison when it was a war depot during the Napoleonic War in the 19th century. The cemetery around the Church of St Michael and All Angels includes the graves of convicts who died during their incarceration in the prison. The Church of St Michael has the distinction of being the only one in England constructed by POWs and is dedicated, as are many churches in high locations, to St. Michael. It was taken out of use due to structural problems and damp and is now maintained by the Churches Conservation Trust, although the building has been stabilised and made safe. The United Church of Princetown can be found at the other end of the village. The village is overlooked from the north-west by North Hessary Tor upon which is a tall transmitting mast that provides a useful guide point for walkers from miles around. Demography The village is mainly made up of white British people living in a mix of social and private housing. There are currently 74 children enrolled at the primary school which was rated 'Good' by Ofsted in 2019. The school itself was constructed in 1874 for the children of prison officers. A further 17 children attend the pre-school, which is contained within the Community Centre in its own purpose-built wing. In 2016 the official population estimate was 1447, with a further 640 inmates of the prison. Most people living in Princetown commute to work in Plymouth or Tavistock, but with the expansion of the brewery a few more jobs have been created locally. The population is projected to keep increasing in the