a market-town in the valley of the Chess, a tributary of the Colne, hundred of Burnham, Buckinghamshire, 26 miles N.W. from London. It contains an ancient cruciform parish church, and two dissenting places of worship, several schools, and an alms-house erected on an ancient foundation. It is the seat of a county court, and has a considerable manufacture of boots and shoes, straw-plait, and wooden ware, for the London markets. There are several paper-mills and a small silk-mill in the vicinity. Pop. (1851) 2,496.