Collis Mill, Smock mill in Great Thurlow, England.
Collis Mill is a wooden smock mill in Great Thurlow standing on a single-story brick base with three additional wooden floors above. Inside, two pairs of grinding stones once processed grain into flour before wind-powered milling stopped in 1915.
The mill was originally built in Slough and transported to Great Thurlow in 1807 to replace an older post mill at the site. It remained in operation until 1915 and was later restored after years of neglect.
The mill displays traditional English milling features with four sails and a distinctive cap steered by an eight-blade fantail system. Visitors can observe these working details that show how millers once harnessed the wind to power their grain processing.
The site can be explored on foot with good views of the structure and its working details from the outside. As a protected heritage building, visitors should expect uneven ground and limited access to the interior.
The building stood derelict without its cap in 1959 until a private collector purchased and fully restored it to working condition. This rescue from decay made it a remarkable example of private preservation of rural industrial structures.
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