That confusion is, in a quiet way, the most interesting thing about it.

The first edition of the OS six-inch map recorded what appeared to be a roughly circular enclosure roughly 35 metres in diameter, the kind of feature that might suggest a ringfort or similar early medieval settlement site. A ringfort, to give the term its due, is typically a circular area enclosed by an earthen bank and ditch, and thousands survive across Ireland in varying states of preservation. By the time the third edition was produced in 1932, the same spot was marked instead as a small circular pit of around 20 metres across, a rather different proposition. What is actually on the ground today is a grassed-over mound of earth and stone about 15 metres in diameter, with a large rectangular pit sitting immediately to its north. The working interpretation is that the original map may simply have recorded the feature incorrectly, mistaking a raised area or depression for an enclosure, or perhaps misreading the relationship between the mound and the adjacent pit. The site has not been excavated, and its origins remain unresolved.

What lingers about Ticooly is not the monument itself, modest and ambiguous as it is, but what its history on paper reveals about how the landscape was read, recorded, and occasionally misread over the course of a century or more of surveying.