In the grounds of Belcamp Park in north County Dublin, there was once a burial mound, the kind of earthen monument raised over the dead in prehistoric Ireland, often marking a significant individual or a community's chosen place of remembrance. Whether it still exists, and precisely where it stood, is no longer clear.

The record of this mound rests almost entirely on a single source. Writing in 1881, Adams noted its presence to the south of the avenue of Belcamp Park, a detail preserved in pages 492 to 493 of that account. A burial mound, sometimes called a tumulus or barrow, is typically a rounded earthen construction raised over one or more burials, occasionally enclosing stone chambers or cremated remains. They are found across Ireland in considerable numbers, though many have been levelled by agriculture or development over the centuries. The Belcamp example sits in an awkward category: recorded once, referenced briefly, and now of unknown location. Geraldine Stout, who compiled this entry, noted as recently as 2011 that the exact position of the monument had not been established.

Belcamp Park lies in the Kinsealy area of north County Dublin, a stretch of land that has seen considerable change over the past century. Anyone curious enough to investigate would be working from that single nineteenth-century reference, with no map coordinates or surviving ground markings to guide them. The avenue mentioned by Adams may itself have changed or disappeared since 1881, which compounds the difficulty. For those with an interest in field archaeology or historical mapping, this is the kind of entry that rewards archival patience rather than a site visit, since there is no confirmed location to visit. It remains, in the most literal sense, a lost monument.