The stone lay embedded in a fence along the western side of the road connecting Raphoe to Clady, where it may have been the remnants of what earlier observers described as an "overturned table-stone of a cromlech"; essentially part of an ancient megalithic tomb. Though the stone's awkward position made detailed examination challenging, researcher Ó Nualláin managed to record its distinctive markings before it disappeared, either removed or destroyed at some point after documentation.

The decoration on this lost stone featured an intricate pattern of cup and circle designs, a form of prehistoric rock art found across Atlantic Europe. The cups, measuring approximately 5 centimetres in diameter and carved 1 to 1.5 centimetres deep into the stone's surface, were each surrounded by concentric circles, with the outermost rings reaching 16 centimetres in diameter. Additional markings, possibly straight lines, were present but proved difficult to define due to the stone's position. These geometric patterns represent a tradition of rock carving that dates back thousands of years, serving purposes that remain largely mysterious to modern archaeologists.

What makes this particular stone especially intriguing is Ó Nualláin's observation that its design seemed to align more closely with Galician rock scribings from northwestern Spain rather than the typical passage grave art found throughout Ireland. This connection hints at ancient cultural exchanges along the Atlantic seaboard, where similar artistic traditions emerged among prehistoric communities separated by hundreds of miles of ocean. While the stone itself is now lost, the careful documentation by Caimin O'Brien and others ensures that this piece of Donegal's prehistoric heritage remains part of the archaeological record, offering tantalising glimpses into the artistic expressions of Ireland's ancient inhabitants.