What makes its situation quietly telling is what the 1842 Ordnance Survey six-inch map records: not one stone but two, labelled together as "Dallauns", a term derived from the Irish word for blind person or, in some traditions, a type of ritual or boundary marker. One of that pair has since vanished from the landscape, leaving its companion to stand alone.

When P. J. Hartnett documented the site in 1939, the second stone was still present, measuring 18 inches in height and lying approximately 11 feet to the west of the survivor. Paired standing stones of this kind are known elsewhere in Cork and across Ireland, and their precise function remains genuinely uncertain; they may have marked boundaries, served ceremonial purposes, or acted as waypoints in a much older organising of land. What adds a further layer of interest at Derryroe is the presence of a ringbarrow in the same field, a short distance to the west. A ringbarrow is a low, circular earthen mound enclosed by a bank and ditch, typically associated with Bronze Age burial. The pairing of standing stones and funerary monuments in a single field is not uncommon in the Irish landscape, and suggests this particular patch of ground held some significance across a considerable stretch of prehistoric time.