It left the archaeological record as a single dry note: "underground chamber filled up." No hollow in the ground, no telltale depression, no surface trace of any kind survives to mark the spot.

A souterrain is a man-made underground passage or chamber, typically stone-lined, associated in Ireland with early medieval settlement. They were commonly built within or close to ringforts, the circular enclosures of earth and stone that served as farmsteads from roughly the sixth to the twelfth centuries, and they are thought to have functioned as refuges, cold stores, or both. The Ballyvouskill example sits within what may be one such ringfort, though the fort itself appears to be only tentatively identified. What little documentation exists comes from a 1937 record by someone named Broker, who noted the chamber but found it already blocked and inaccessible. Whether it was deliberately filled, collapsed under its own weight, or simply silted up over time, the record does not say. By the time it entered the published archaeological inventory of mid Cork, the entry amounted to little more than an acknowledgement that something once existed here and does so no longer, at least not in any form that can be seen or measured.