Qualla: Bourn Windmill

Bourn Windmill: Introduction

Wed, 27 May 2026 00:00:00 GMT

Tree-ring dating cannot lie. When the dendrochronologists looked at the great oak post that holds up Bourn Windmill - the timber on which the entire body of the mill swivels to face the wind - they found that the tree had been felled some time after 1515. That means the post had been growing in some Cambridgeshire wood throughout the reign of Henry VIII's father, was cut down probably during the first decades of Henry VIII's own reign, and was shaped, raised and pegged into place when Catholic Europe and the new Protestant England were still arguing about whether the new break was permanent. The earliest written record of a windmill at Bourn appears in a deed of 1653, which states that the mill had been sold from John Cook to Thomas Cook in 1636. But the tree-ring evidence pushes the structure back well over a century earlier. Whether Bourn is the absolute oldest surviving windmill in the United Kingdom - or whether that title goes to Pitstone Windmill in Buckinghamshire, which may predate 1627 - is a question that windmill historians continue to argue about politely. Either way, this small wooden building on a chalk hilltop seven miles west of Cambridge is one of the oldest functioning pieces of industrial heritage in Britain.

Read more: Bourn Windmill on Qualla

Bourn Windmill: How an Open Trestle Post Mill Works

Wed, 27 May 2026 00:00:00 GMT

A post mill is the most ancient design of windmill, and an open trestle post mill is the most exposed version of that design. The entire wooden body of the mill - the part that contains the millstones, the sack hoists, the gearing and the working space - sits balanced on a vertic...

Read more: Bourn Windmill on Qualla

Bourn Windmill: A Century of Tenants

Wed, 27 May 2026 00:00:00 GMT

The documentary history of Bourn Windmill is a long sequence of ordinary local transactions. In 1653, Thomas Cook sold the mill to William Smythe, a blacksmith from Caxton, a village a few miles to the east. In 1779, John Butler, a farmer in Bourn, leased the mill; he bought it o...

Read more: Bourn Windmill on Qualla

Bourn Windmill: The 1932 Handover and Don Quixote

Wed, 27 May 2026 00:00:00 GMT

In 1931, two men decided Bourn Windmill should be saved. They were Alfred Bossom - a Conservative MP, architect and later a peer, who had made a fortune building skyscrapers in America - and Mansfield Forbes, an unconventional Cambridge English don famous for hosting riotous part...

Read more: Bourn Windmill on Qualla

Bourn Windmill: Rot, Norman Foster, and the 2023 Reopening

Wed, 27 May 2026 00:00:00 GMT

In October 2020 the worst possible news arrived for an open trestle post mill: rot had been discovered in the crosstrees - the two horizontal beams that carry the central post and therefore the entire weight of the mill body. The repairs done in the 1980s had infilled rotten cavi...

Read more: Bourn Windmill on Qualla