The Hilton of Cadboll Stone is a Class II Pictish stone discovered at Hilton of Cadboll, on the Tarbat Peninsula in Easter Ross, Scotland. It is one of the most magnificent of all Pictish cross-slabs. On the seaward-facing side is a Christian cross, and on the landward facing side are secular depictions.
A, late-16th century, vision of a Pictish warrior (clearly based on Herodian's description of the “barbarians” of Caledonia) by John White. The overall blue tinting of the body is inspired by a remark made by Julius Caesar, who had spent a few weeks in the south-eastern corner of Britain in 55BC and 54BC: “All the Britons, without exception, stain themselves with woad, which produces a blueish tint; and this gives them a wild look in battle.”
The earliest surviving mention of the Picts dates from AD297. In a poem praising the Roman emperor Constantius Chlorus, the orator Eumenius wrote that the Britons were already accustomed to the semi-naked "Picti and Hiberni (Irish) as their enemies."