Here's a tenuous* route back to the thread title: Roman auxilliaries stationed on the line of That Bloody Wall may also have included Iberians who recognised the significance of the cups and rings of what is now Northumberland, and in doing so, may have snaffled the cup marked stone found at Arbeia (and another at Corstopitum fort).

This leaves a very slight chance that one day, one of the Vindolanda tablets might include a passing reference by some Romano-Iberian. Something like "Ey Mum, you'll never believe it, but the barbarians up here have the stones here too!"

*Also very, very wishful thinking.