The site is known as Caltra, a word most likely derived from the Irish "cealtrach", a term used for ancient or disused burial grounds. Yet there is no visible evidence of burial here at all. No stones break the surface, no earthwork marks the boundary. What was recorded on the third edition of the Ordnance Survey six-inch map in 1930 is a roughly rectangular area of approximately 80 by 75 metres, outlined only with a broken line, as if the cartographers themselves were uncertain what they were dealing with.

The name alone places the site within a recognisable tradition of early Irish sacred or mortuary landscape, and the word "cealtrach" appears in place-name scholarship as a marker of burial grounds that were often already ancient when they were first recorded in writing. What gives this particular field an additional strangeness is a single piece of local tradition: a sword was found here. No date is attached to the find, no description of the object survives in any formal record, and it is not clear whether it was ever deposited with a museum or simply passed from hand to hand and eventually disappeared. But a sword in a field that carries the name of a burial ground invites a certain amount of quiet speculation about what the soil might still contain.