Others exist only as a note in a record, their physical presence long since swallowed by field or road or later construction. A sixteenth or seventeenth century house in the townland of Middletown, County Dublin belongs firmly to the second category. No walls survive, no earthworks indicate a footprint, and no precise coordinates can be given. What remains is an entry in an archive, and the knowledge that something once stood here.

The sole evidence for the dwelling, or dwellings, comes from the Down Survey, a remarkable mapping project carried out between 1655 and 1656 under the direction of William Petty. Commissioned in the aftermath of the Cromwellian conquest of Ireland, the survey was designed to record forfeited Catholic-owned land in enough detail to allow its redistribution to soldiers and creditors of the parliamentary campaign. Petty employed teams of surveyors to produce parish-level maps of unprecedented coverage, and it is on one of these maps that Middletown townland appears with dwellings marked. The survey tells us occupation existed here in the mid-seventeenth century, likely representing structures whose origins reached back into the previous century given the date range assigned to the monument. Beyond that, the record goes quiet. No name of an owner, no description of the building, no indication of whether it was a modest farmhouse or something more substantial.

Because the exact location of this monument is unknown, as noted by researcher Geraldine Stout when the record was compiled in 2011, there is no specific point on the ground to visit. Middletown is a small townland in County Dublin, and the Down Survey maps themselves are freely accessible online through the Trinity College Dublin digital archive, where anyone curious about what Petty's surveyors recorded in this corner of Leinster can examine the original cartography. For those interested in the survey as a historical source, it rewards careful reading, offering a snapshot of landholding and settlement across Ireland at one of its most turbulent moments, even when, as here, the physical traces of what was mapped have entirely disappeared.