In 787 AD when the Vikings landed on Portland, the King’s representative, his Reeve, rode from Dorchester to meet them. He assumed that they were traders and asked them to pay a trading tax. Whereupon, the Vikings killed him and his companions.
“And in the days of King Bertric came first three ships of the Northmen from the land of robbers. The reeve then rode thereto, and would drive them to the king’s town; for he knew not what they were and there was he slain. These were the first ships of the Northmen that sought the land of English nation.”
Anglo Saxon Chronicle AD 787