Cross slab which had been built into a wall at St Ninian’s Cave, Isle of Whithorn. It is carved with an encircled cross with expanded arms which are marked by four small circles. There are dots at the centre of each circle. This design appears repeatedly on St Ninian’s Cave sculpture, and bears similarities both to the encircled cross-of-arcs on 2 and to the heads of the ‘Whithorn School’ crosses. It is carved from the same type of stone as the ‘Whithorn School’ crosses, and so could have come from the same source at a similar time.

The stones from St Ninian’s Cave had all been moved from their original positions before discovery. The cave was probably an early medieval chapel.