It is easy to overlook, and that is partly the point. This was once a carding mill, a place where raw wool was mechanically combed and separated before spinning, and the particular way it was constructed tells a quiet story about how rural industry once worked.

The building's most revealing feature is a narrow wheel-pit, just over a metre wide, running along the eastern wall. This would almost certainly have housed a high breastshot or overshot waterwheel, the kind driven by water delivered near or above the wheel's midpoint or crown, allowing it to extract maximum force from a relatively modest flow. The design suited a minor watercourse rather than a powerful river, which fits the site's position on a tributary rather than the Lee itself. A door opening survives in the southern wall, which would have faced the slope's downhill side, the most practical arrangement for access and for managing the flow of water and materials. Carding mills of this type were once common in Cork and across rural Ireland, processing the wool that came from farms too small to justify hand-carding at scale, but most have either vanished entirely or survive only as fragments like this one.