Not dramatically, not through demolition or deliberate erasure, but quietly, through time and tillage and the slow levelling that working land inflicts on whatever lies beneath it. A small circular platform earthwork, the kind of low raised feature that once would have been legible as a distinct bump in the ground, has sunk below the threshold of visibility. Walk the field today and you would have no reason to stop.

The earthwork's existence is known only because the first edition Ordnance Survey six-inch map, produced in 1840, recorded it clearly enough to be depicted. That mapping campaign was extraordinarily systematic, and its surveyors were generally diligent about marking earthworks, enclosures, and other features that the local population recognised as old, even when their original function was unclear. A platform-type earthwork, in broad terms, is a low raised area of ground, sometimes the remnant of a structure or an enclosed space, sometimes the result of deliberate mounding. What this particular example at Boherleigh represented in its original form is no longer determinable. By the time later editions of the six-inch maps were produced, it had already ceased to register as a feature worth recording, which suggests it was degrading through the second half of the nineteenth century. Now it is gone from the surface entirely.

There is nothing to see at ground level, and that is precisely what makes the place worth a moment's thought. The 1840 map is the sole material witness to whatever once stood or was raised here, in undulating Tipperary countryside that has swallowed the evidence whole.