a market-town and parish in Lincolnshire, 20 miles N.N.E. of Lincoln, and 153 miles from London. It was called by the Saxons Thong-Castor, because, it is said, Hengist, after defeating the Scots, obtained from Voltigern as much land as could be inclosed by an ox-hide cut into thongs. It has a grammar-school, with an exhibition at Jesus College, Cambridge. Market-day Saturday. Pop. of parish (1851) 2407.