sentences:  The Picts were in turn displaced some thousands of years later by the invading Celts, and driven northward into Scotland where they interbred with a tribe of 'red haired barbarians,' resulting in a genetic shift toward diminished height.Following subsequent Roman, Breton, and Saxon invasions, the Picts too sought refuge underground, just like the natives they had displaced before.An interesting point is that, in the Hyborian age stories such as Beyond the Black River, when they populated the Western edge of Europe and share a border with Aquilonia, which tries to push them further west to colonize new provinces, the Picts show clear Native American influence, in their appearance, dress, armament, manner of conducting wars, and even the place names of the new Aquilonian provinces.