That boundary line, still marking the edge between two named parcels of land, bisects what was once recorded as a substantial enclosure, roughly 55 metres across its longer axis. The boundary did not create the enclosure; the enclosure was there first, and the administrative line was drawn later, cutting across it with the indifferent geometry of surveyors who may or may not have recognised what lay beneath their feet.

The site appears on the Ordnance Survey map of 1838 as a circular enclosure, and on the later 25-inch plan it is shown as broadly oval, measuring approximately 55 metres north-east to south-west and 45 metres north-west to south-east. By the time the 1929 OS 6-inch revision was produced, it had vanished from the record entirely, levelled out of the landscape and leaving no visible surface traces. It is classified as a possible ringfort, a type of enclosed settlement, typically circular or oval in plan and defined by an earthen bank and ditch, that was used across Ireland from the early medieval period onwards. Thousands survive, but many more were cleared for agriculture over the centuries, their banks spread and their ditches filled. This one in Houndswood followed that common fate somewhere between the late nineteenth century and the early twentieth.

What makes the Houndswood enclosure quietly strange is the gap between its documented existence and its physical disappearance. Two separate map surveys recorded it, with slightly different shapes, suggesting it was substantial enough to be clearly visible on the ground for much of the nineteenth century. Then, within a few decades, it was gone. The townland boundary that once bisected it remains, a line on a map that now crosses nothing but grass, carrying the faint outline of something that can only be inferred.