This slab was found at a keeill site (IOMHER 0942.00) close to Greeba Mills. Unusual crosses are carved on both faces. On one side a cross in outline is formed by overlapping a thin vertical ellipse with two horizontal lines. On the other, two vertical and three horizontal lines cross to form the symbol, contained within a roughly circular frame, with additional lines creating another cross within the upper limb. Several curved lines below the frame perhaps suggest fishscales.