In South Shields a persistent rumour has been going round for quite a while; the gist being that boatmen from mesopotamia were brought over by the romans to man the boats/ act as stevedores for the supply ships harbouring in Shields.
Yup. The Guardian article said they were bargemen - fascinating stuff.
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!"
It's mind boggling to imagine such a mix of people, cultures and beliefs coexisting more-or-less peacefully at Arbeia some sixteen hundred years ago. It's even more mind boggling to imagine, as akas555 suggests, that contingents from the Middle East stayed on to establish Britain's first Arab community. I wonder if they set up kebab-style take-aways? I bet they did - skewered lamb with neeps and onions washed down with the local brew :-)