A century ago, it looked quite different. Encircled at its base by a field wall and planted thickly with a mixture of deciduous and coniferous trees, it would have read as a deliberate and rather elegant landscape feature, the kind of thing a Georgian landowner would arrange to be seen from the windows of a country house. That house, the surrounding wall, and every one of those trees are now gone.

Annefield House was built in 1795, and the hillock sits roughly 200 metres to its east. Tree-rings of this kind were a common device in designed estate landscapes of the eighteenth and nineteenth centuries, using planting and enclosure to turn an unremarkable piece of ground into a visual focal point or boundary marker within the wider demesne. When the Ordnance Survey mapped this part of Mayo in 1838, no such feature was recorded here. By the 1915 edition, however, a large oval enclosure appears clearly, measuring approximately 35 metres east to west and 60 metres north to south, its interior shown as wooded. Somewhere in that seventy-seven year gap, someone decided the hillock was worth dressing up. Local knowledge holds that both the encircling wall and the trees were cleared away during land reclamation work in the twentieth century, leaving the hillock to revert to its original, unremarked state.

There is nothing to see at the site itself in the conventional sense; no stonework survives, no planting remains. What persists is the landform, the same natural rise that once anchored a small designed landscape, now returned fully to pasture. Its interest lies almost entirely in the gap between what the two maps record and what the ground currently shows.