AMERSHAM OR AGMONDESILAM, an old market town in Buckinghamshire, pleasantly situated in the valley of the Misbourn, a small tributary of the Colne, 32 miles from Buckingham, and 26 from London. It consists chiefly of a main street crossed by a smaller one ; and possesses a handsome church, containing some beautiful monuments, several dissenting places of worship, a town-hall, built in 1642 by Sir William Drake, and a grammar school. It has manufactures of black lace, cotton, straw-plait, wooden chairs, flour, and beer. Edmund Waller, the poet, was born near Amersham, and sat for the borough, which. sent two members to parliament until 1832. Population of parish in 1871, 3259.