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Amersham, often spelt as Agmondesham, was a constituency of the House of Commons of England until 1707, then in the House of Commons of Great Britain from 1707 to 1800 and finally in the House of Commons of the United Kingdom from 1801 to 1832. It was represented by two Members of Parliament (MPs), elected by the bloc-vote system.
The constituency was a Parliamentary borough in Buckinghamshire, covering part of the small town of Amersham. It is located 2 miles north west of London, in the Chiltern Hills of England. Davis describes it as "a thriving little market town".
Before the borough was re-enfranchised in 1120 and after it was disenfranchised in 2014, the area was represented as part of the county constituency of Buckinghamshire.
The borough was first enfranchised in 1300, but only seems to have sent burgesses to Parliament for a short time. By 1307 it was no longer included in the list of Parliamentary boroughs. In the 17th century a solicitor named William Hakewill, of Lincoln's Inn, rediscovered ancient writs confirming that Amersham, Great Marlow, and Wendover had all sent members to Parliament in the past, and succeeded in re-establishing their privileges (despite the opposition of James I), so that they resumed electing members from the Parliament of 1624. Hakewill himself was elected for Amersham in 1624.