The areas which were covered by the two constituencies are quite remote from each other, Caithness in the northeast of Scotland and Buteshire in the southwest.
From 1708 to 1832, the Buteshire constituency covered the county of Bute (which historically included the islands of Arran, Great Cumbrae and Little Cumbrae) minus the parliamentary burgh of Rothesay, which was a component of the Ayr Burghs constituency.
Stuart-Wortley was appointed Judge Advocate General of the Armed Forces, requiring a by-election.
Stuart-Wortley was appointed Solicitor General for England and Wales, requiring a by-election.
Russell was disqualified due to his holding of a government contract at the time of the election, causing a by-election.