I’ve featured a number of windmills on this blog, because they fascinate me as ingenious structures in which a distinctive architectural form is well adapted to do the job it needs to do – housing heavy machinery such as large rotating millstones and supporting a set of sails that harness the power of the wind. There needs to be a means of pointing the sails in the right direction, so that they catch the breeze, and the whole structure has to be at once robust, to withstand the considerable forces exerted by the mechanism, and lightweight, as at least part of it has to rotate. From conical brick tower mills, with their rotating caps, to wooden post mills, the whole of which can be rotated by hand, windmills do this job elegantly. There’s another type, a kind of wooden tower mill, that’s polygonal with a turning cap that often looks rather like an upturned boat. This sort is known as a smock mill* and one of the best preserved examples is the octagonal one at Lacy Green in Buckinghamshire.
Lacy Green Windmill is generally accepted to be the oldest surviving smock mill in England.† The machinery inside dates to somewhere around the middle of the 17th century. There is an old story that the mill was moved from Chesham to Lacey Green in 1821. It’s certainly possible to move a windmill in this way§ but researchers who have trawled the archives and archaeologists who have examined the alleged original site doubt that this was mill was moved. It seems more likely that the mill had a major overall in 1821, when perhaps much of the structure was rebuilt and the machinery upgraded. There are certainly records of a mill at Lacey Green before 1821.
The windmill ran for almost a century after this rebuild, finally ceasing work in 1915, after which it was used as holiday accommodation for a while. However, by 1930 it was in a poor state due to water penetration. There was a restoration, but by 1969 the mill was once again close to collapse. A team led by the engineer Christopher Wallis set about removing the cap and the single surviving sail, straightening the twisted structure, and restoring the frame, sides, and floors. This process was complex and took years – an account of it is on the mill’s website. The restoration seems to have been effective, and the mill currently appears to be well looked after – our oldest smock mill looks to be good for many more years.
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* Because the overall shape is said to resemble a peasant wearing a smock.
† It’s not entirely simple to come to a judgement about the age of a wooden building, since many parts of it can be replaced, like the notorious ancient broom that had had many new handles and several new brush heads. Here the machinery seems to be the oldest part.
§ See my blog post about the wonderful post mill at Thorpeness, Suffolk.
