Keston Windmill Keston · London · England

Keston Windmill was built in 1716 as a post mill for grinding corn into flour. The mill stands on a brick roundhouse which encloses the trestle, and the date 1716 is carved on the main post. Its working arrangement included four double patent sails on a cast-iron windshaft, tailpole winding, a wooden brake wheel, a cast-iron wallower, a cast-iron great spur wheel with wooden cogs, and two pairs of underdrift millstones in the breast of the mill.

In December 1836 the Westerham millwright William Ashby fitted new sails and repaired the breast of the mill. Wind working continued into the nineteenth century, with final working dates given as either 1878 or 1900. In 1955 the mill received legal protection.

It survives as a Grade I listed post mill, privately owned and preserved with its machinery intact but not in working order.