That quietly improbable shift in purpose is one of the more curious details attached to this structure on the eastern bank of a stream at the southern entrance to Hoddersfield House in County Cork. The building is rectangular, oriented north to south, and substantial enough to have housed industrial machinery across multiple floors. It is the kind of place that accumulates lives quietly, each use leaving its trace on the fabric of the structure.

The mill's water management features are still legible in the stonework. Along the western wall at the southern end sits a wheelpit, roughly a metre wide and four and a half metres long, where the waterwheel once turned. A low semi-circular arch with cut stone voussoirs, the wedge-shaped blocks that lock an arch together, marks the tail race, the channel that carried water away after it had done its work. To the north-north-west, an open channel may be the remnant of the millrace that fed water in, and a mill pond occupies the same general direction. The full hydraulic circuit, intake, wheel, and outfall, remains at least partially readable on the ground. Less expected is what a previous owner recalled about the first floor: a thrashing machine powered by a hot bulb engine. A hot bulb engine is an early type of internal combustion engine, simpler and cheaper to run than a steam engine, and widely used in rural industry in the late nineteenth and early twentieth centuries. Its presence here suggests the mill had already moved beyond pure water power before its most recent transformation into a sail-making factory.