That tree is gone now, leaving behind only a nineteenth-century description and a stretch of suburban road where almost nothing marks the spot. The absence itself is part of what makes this place worth knowing about.

The antiquarian W. F. Wakeman, writing in 1892, recorded the details in his notes on the area around Killiney church. He described a boreen, a narrow country lane, that served as the main approach to the church from the west. On the left-hand side of this lane, visitors would have passed a cairn, essentially a mounded pile of stones that often served as a kind of informal altar or focal point for local devotion, and beside it stood an old thorn tree regarded as sacred by the surrounding community. Thorn trees, particularly hawthorns, occupy a long and complicated place in Irish folk belief, often associated with fairy activity, holy wells, or the boundaries between ordinary and otherworldly space. People would leave offerings at them, avoid cutting them, and sometimes pray near them. The combination of a cairn and a thorn tree at the entrance to a church lane suggests a site where older, informal religious practice and the formal church existed in close proximity. The church itself sits off Marino Avenue West, which leads east from the Killiney Hill road.

Today, no trace of the thorn tree survives, and the research compiled by Geraldine Stout and Padraig Clancy confirms that nothing physical remains to mark the spot. A visitor walking the approach from Killiney Hill road along Marino Avenue West is essentially retracing Wakeman's route, though the boreen he described has long since been absorbed into the modern street. The value here is less in what can be seen and more in what the historical record quietly preserves: the shape of a devotional landscape that has otherwise disappeared entirely into the ordinary fabric of south County Dublin.