A small bogland structure near Killoran in County Tipperary belongs firmly to the second category. Recorded in 1994 and gone by 1995, it survived long enough to be measured and documented, but not long enough to be seen again by anyone who might have wanted to look.

The structure sat on flat bogland, the kind of low, wet terrain that peat-cutting companies have worked across the Irish midlands for generations. When the Irish Archaeological Wetland Unit, based at UCD, surveyed it in 1994, they found a subrectangular area measuring roughly 5.6 metres east to west and 4 metres north to south. Its outline was defined by wooden uprights of several kinds, roundwood, brushwood, and half-split posts, with three internal stakes running across the interior of the space. The form is consistent with a simple built shelter, the sort of lightweight, organic construction that bogs preserve extraordinarily well precisely because waterlogged, oxygen-poor conditions slow the decay of wood. Within a year of that survey, peat milling had removed it entirely. What the excavators recorded in those few months between discovery and destruction is now the whole of what is known.