Somewhere in the boggy ground of Sheskin in County Waterford sits a roughly square earthen enclosure that refuses to behave like its surroundings. The land around it is wet and muddy, but the interior of the enclosure stays dry, a peculiarity that is difficult to explain and that gives the place an odd, set-apart quality. The bank defining it, built with inner and outer stone revetment, that is, facing stones on both sides of the earthwork to stabilise and retain it, survives to a reasonable height in places. A stone-lined entrance passage runs through the south-east sector, about three metres long and just wide enough for one person, and beside it a small rectangular stone feature may be the remnant of a gate pier. A few metres to the south-west stands a low, rough-walled stone structure, about a metre high and two metres long, which the current landowner identifies as the remains of a windmill.

That windmill, if that is indeed what it was, may connect the enclosure to a particular family. In 1899, Joseph Grubb built Sheskin House roughly 150 metres to the south-east. Grubb had a documented interest in geology, botany, and archaeology, and it is thought the small structure may have been linked to his meteorological work on the property. His daughter Isabel Grubb wrote about the enclosure in 1944, describing it as a prehistoric burial site. She recorded a box-like stone chamber at its centre, formed of large slabs mostly tilted out of position, with one slab having fallen inward and blocked the central space from examination. She noted two irregular rings of upright stones surrounding this central feature, many of them weathered, some apparently smashed. Her measurements differ somewhat from those recorded more recently, which may reflect the further deterioration of the structure in the intervening decades, or simply the difficulty of measuring a feature so overgrown with gorse and scrub. The first edition six-inch Ordnance Survey map, surveyed in 1841, shows the area as bog and marsh, which suggests the enclosure pre-dates any landscaping associated with Sheskin House. Whether it is prehistoric, as Isabel Grubb believed, or of some later origin entirely, remains unresolved.