When Roger Cole stepped out of his Land-Rover on Haddiscoe Island, near Yarmouth, he put his foot on what he thought was a pile of old Co-op dividend tokens. On closer inspection, the foreman of the flood defence work site realised they were silver coins and quickly picked up around 200 of them. An expert from Norfolk Landscape Archaeology (NLA) was called in and found a further 100 in the tracks made by a bulldozer. The coins are dated between 1550 and 1646, and the theory of NLA finds liaison officer Dr Adrian Marsden, based at The Castle Museum, Norwich,...