The parishes of Drypool, Marfleet, Sculcoates, and most of Sutton parish, were absorbed within the borough of Hull in the 19th and 20th centuries. Much of their area has been built over, and socially and economically they have long been inseparable from the city. Only Sutton retained a recognisable village centre in the late 20th century, but on the south and east the advancing suburbs had already reached it. The four villages were, nevertheless, distinct communities, of a largely rural character, until their absorption in the borough—Drypool and Sculcoates in 1837, Marfleet in 1882, and Sutton in 1929. The current boundaries of the city are tightly drawn and exclude many of the metropolitan area's nearby villages, of which Cottingham is the largest. The city is surrounded by the rural East Riding of Yorkshire.