[00:22.41]Tacitus declared it "pretium victoriae" - worth the conquest, [00:27.30]the best compliment that could occur to a Roman. [00:33.12]He'd never visited these shores, [00:34.72]but was nonetheless convinced that Britannia was rich in gold. [00:42.61]Silver was abundant there, too. [00:44.51]Apparently so were pearls, [00:46.40]although Tacitus had heard they were grey, [00:48.92]like the overcast rain-heavy skies, [00:51.78]and the natives only bothered to collect them [00:54.31]when they were cast up on the shore. [00:59.57]As far as the Roman historians were concerned, [01:01.72]Britannia might well be off the edge of the world, [01:04.89]but it was off the edge of their world, [01:06.69]not in some howling, barbarian wilderness. [01:09.90]If the same writers had been able to travel in time [01:13.11]as well as space to the northernmost of our islands, [01:16.83]to the Orcades - our modern Orkney, [01:19.51]they would have seen something much more astonishing than heaps of pearls [01:23.67]The unmistakable signs of a civilisation thousands of years older than Rome.