No century is assigned to it, no builder named, no period of occupation confirmed. It sits in the archaeological record as a kind of placeholder, a building whose existence has been noted but whose story has not yet been told.

The placename Cartron is itself a clue of sorts. Derived from the Irish "ceathrú", meaning a quarter, it was a unit of land division used widely across Connacht in the medieval and early modern periods, typically denoting a quarter of a baile or townland. That a structure in such a place remains undated speaks less to an absence of history than to the sheer density of the unexamined archaeological landscape in rural Mayo, where field surveys have recorded far more than has yet been fully interpreted or published.