For the past 50 years—since the discovery of a thousand-year-oldViking way station in Newfoundland—archaeologists and amateur historians have combed North America’s east coast searching for traces of Viking visitors.

It has been a long, fruitless quest, littered with bizarre claims and embarrassing failures. But at a conference in Canada earlier this month, archaeologist Patricia Sutherland announced new evidence that points strongly to the discovery of the second Viking outpost ever discovered in the Americas.