That quiet absence is part of what makes this spot in Mountelliott, County Wexford, worth a moment's attention. Tobar na Caillí, the well of the nun or cailleach, belongs to a widespread class of Irish holy wells, sites typically associated with patterns, offerings, and localised devotion. Here, though, none of that survives in the physical record.

The name itself has a long paper trail. The nineteenth-century scholar and place-name collector John O'Donovan noted it around 1840, and it appears in gothic script on the Ordnance Survey six-inch maps of 1839 and 1840, a form of lettering the OS used to mark antiquities and features of historical interest. The well sits in a small valley running roughly south to north, carved from rock, about thirty-five metres south of the River Barrow as it runs east to west through the landscape. It is a compact, rectangular structure, less than a metre wide and not quite a metre deep, with a brick surround, a stone lintel across the top, and an opening facing east. A small stream rises from a source about five metres to the south, giving the spot a natural logic as a water source, whatever older meaning the name may carry.