By the mid 7th century only Dumbarton, of all the Britonnic Kingdoms of Scotland, had survived the ... formidable rock fortress of Dumbarton. For four months the starving Britons held out, until ...

In England, Scotland and Ireland, the Vikings established settlements and even kingdoms. They would, from the 780s until 1100, be a significant factor in the politics of all four countries.

Sailing up the Clyde towards Glasgow there is a vast and imposing sentinel guarding the river at Dumbarton. As a fortress Dumbarton Rock has a long and proud history, and, in fact, has a longer ...