That much is certain. What is less certain is almost everything else: when it was built, by whom, and in what condition it now survives. It has been recorded as a monument, which means someone, at some point, considered it old enough or significant enough to note down. Beyond that, the record is silent.

Cullin sits in a county shaped by cycles of settlement, clearance, and abandonment. Mayo was among the most severely affected regions during the nineteenth century, and its landscape is scattered with the remains of houses that were built, occupied, and left, sometimes within the span of a single generation. A structure described with the phrase "indeterminate date" could belong to almost any period, from a late medieval dwelling to a post-Famine ruin, and the inability to date it precisely is itself a kind of historical information. It suggests a building that has shed its documentary traces, or one whose fabric does not conform neatly to recognised types.