No stone, no outline, no depression in the ground gives any hint that a building once stood here. The only evidence is cartographic: the 1837 edition of the Ordnance Survey six-inch map, one of the earliest and most systematically detailed mappings of the Irish landscape, marks a small rectangular structure on this spot, aligned on a northeast to southwest axis, and labels it simply as "Church".

The six-inch OS maps of the 1830s were produced with considerable care, and a named building appearing on them was not placed arbitrarily. Whatever stood at Kilmakinlan was considered significant enough to record and identify by function. The northeast to southwest alignment is a detail worth pausing on: early Irish churches were often oriented along an east to west axis in keeping with Christian liturgical tradition, so a northeast to southwest alignment may point to a structure with particular local or topographical reasons for its placement, or possibly to considerable age. Whether it was already a ruin by 1837, or whether it disappeared in the decades that followed, the map does not say. By the time anyone thought to look for it on the ground, it had gone entirely, absorbed back into the grass of a field running along one of Ireland's great inland waterways.