William Key took over the running of the Anstruther Brewery in 1874, following the death of his brother, John Melville Key, After his father James's death in 1886 he inherited the brewery, which he then ran under his own name.
The trademark of the business was a key on a background of barley.
When he retired in 1905 he sold off the Anstruther Brewery and associated aerated water interests to the Anstruther Aerated Water Company.
Amongst the beers produced by the brewery was Double Brown Stout.
The Anstruther Brewery was on Burial Brae, and consisted of a group of buildings organised around a courtyard.
Books and periodicals
Gibb, F. The brewers and breweries of Fife. Stirling: Lomax Press, 2012.