The constituency was a parliamentary borough in Buckinghamshire, covering part of the small town of Amersham.
Before the borough was re-enfranchised in 1624 and after it was disenfranchised in 1832, the area was represented as part of the county constituency of Buckinghamshire.
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.
[1] The right of election was held by householders paying scot and lot, a local tax.
However, because this was a small borough, from the seventeenth to the nineteenth centuries, it was under the patronage of the Drake family of Shardeloes (an estate about a mile from the town).
Uncontested elections were accompanied by generous expenditure, estimated by Davis as £350 in the eighteenth century and £600 in the 1820s.
In by-elections, to fill a single seat, the first past the post system applied.
Sources: The results for elections before 1790 were taken from the History of Parliament Trust publications on the House of Commons.