Threshing Barn and Horse Engine House 5 Metres North-North-West of Buckland Manor House

This is a threshing barn with an attached horse engine house, built in 1712, marked by two datestones both initialled H.I. The structure is made of rubble and features a pantiled roof, gabled at the upper end and hipped at the lower end. There are rubble outshuts with pantiled lean-to roofs added on both sides. At the upper end, there are two large double threshing doors, with the right door retaining its original planking. Inside, six trusses with straight heavy principals remain, featuring pegged collars and two tiers of purlins. The horse engine house at the rear has a decagonal roof made of small slates, supported by tapering rubble pillars, and is partially infilled on seven sides with rubble walling, creating a circular plan. It includes three tiers of purlins between the rafters, which are torched, along with some replacement principals. The structure also contains a complete massive gearing beam with a horse-driven vertically shafted winding cog, making it a rare and unusually complete example of its kind.