What makes it worth a second thought is what lies beneath its footprint, or rather, what no longer does. The building occupies the approximate site of a seventeenth-century dwelling recorded on one of the most ambitious mapping projects ever undertaken in Ireland, yet nothing of that earlier structure survives above ground.

The Down Survey, carried out between 1655 and 1656 under the direction of William Petty, was a systematic attempt to map the forfeited lands of Ireland following the Cromwellian conquest. It remains one of the earliest large-scale land surveys in the world, and it captured the distribution of settlements, townlands, and property across the country at a moment of profound upheaval. The fact that a dwelling was recorded on this map at Tobertown places the site within that particular convulsive chapter of Irish history, when land ownership was being forcibly redistributed and the landscape itself was being measured and redistributed on paper. The current farmhouse, compiled in the records by archaeologist Geraldine Stout and uploaded to the national inventory in August 2011, sits on the approximate location of that earlier structure, though no physical trace of the original building has been identified.

Tobertown is a small townland, and there is nothing to mark this site out visually from the surrounding countryside. The farmhouse itself is a working building rather than a monument, so visitors should be respectful of private land and not expect access. The interest here is largely conceptual, the way a present-day structure can sit unknowingly atop the ghost of an older one, its outline preserved only in a mid-seventeenth-century survey drawing rather than in brick or stone. For anyone exploring the lesser-documented corners of the Dublin countryside with a copy of the Down Survey maps to hand, comparing the historic record against what actually stands on the ground today can be a quietly instructive exercise in how thoroughly time erases things.