The Times has more on a story I wrote about back in 2013, the fascinating archaeology at Sandby Borg on the Swedish island of Öland. Some time around 500 CE, the fortified settlement was attacked and its inhabitants slaughtered, their bodies left to lie among the ruins of their houses. Twenty-six victims have been identified so far.
But both could be right; the message first and the stories of the curse later. Because it is hard to see why the message would still carry fatal force twenty years after the attack, when the site would still be well known and highly visible.