It is now generally accepted that Leif Eiriksson sailed from Greenland across the Davis Strait and made landfalls on the North American continent almost a thousand years ago, but what happened in this vast area during the next five hundred years has long been a source of disagreement among scholars. Using new archaeological, scientific, and documentary information (much of it in Scandinavian languages that are a bar to most Western historians), this book confronts many of the unanswered questions about early exploration and colonization along the shores of the Davis Strait. The author brings together two distinct but tangential fields of inquiry: the history of medieval Greenland and its connection with the Norse discovery of North America, and fifteenth-century British maritime history and pre-colonial voyages to North America, including that of John Cabot.