The circular enclosure that once marked a graveyard to the east of Westaston House was levelled in 1836, two years before the first Ordnance Survey six-inch map recorded it, meaning the cartographers captured something that had already been erased. That 1838 map still carries the label "Site of Grave Yard", a quiet notation for something that had just been wiped from the landscape.

The ecclesiastical history behind this vanished site reaches back further still. The Crede Mihi, a medieval register of the archdiocese of Dublin, contains a reference to a rector at Kilmacurragh, the townland in which Westaston sits, dating to before 1275. This suggests a church was functioning here in the early medieval period, long before any demesne was laid out across the slope. Circular enclosures of this kind are often the most durable feature of early Irish church sites; they mark the sacred boundary of the original foundation, the consecrated ground within which a community buried its dead. When such an enclosure is identified, it usually points to origins considerably older than any surviving stonework. Here, even that enclosure is gone, levelled presumably to tidy the parkland surrounding the house.