The constituency encompassed the county of Haddingtonshire, with the exception, until 1885, of three towns (Haddington, Dunbar and North Berwick) which formed part of the separate constituency of Haddington Burghs.
Broun-Ramsay succeeded to the peerage, becoming 10th Earl of Dalhousie and causing a by-election.
Charteris was appointed a Lord Commissioner of the Treasury, requiring a by-election.
Charteris is elevated to the peerage, becoming Earl of Wemyss and March, causing a by-election.
The political parties had been making preparations for an election to take place and by July 1914, the following candidates had been selected;