It appears in the historical record only as a brief, tantalising footnote, described simply as a "vault" found before 1919. That single word carries a great deal of weight in Irish archaeology, because what such sources typically mean by it is a souterrain, an artificially constructed underground chamber or series of passages built from drystone walling and roofed with large lintels. These structures are found across Ireland, most commonly dating from the early medieval period, and were likely used for storage, refuge, or both, often associated with nearby settlement sites.

The sole reference comes from O'Leary, writing in 1919, who noted the discovery without elaborating on when it was made, by whom, or what was found inside. That is the entirety of what is known. No dimensions were recorded, no finds were catalogued, and no subsequent investigation appears to have taken place, or if it did, nothing was published. The site sits in a category familiar to anyone who has worked through Irish county inventories: places that surfaced once in local knowledge or casual observation, were noted down in passing, and then quietly disappeared back into the landscape.