Immigration historians in Canada and the United States are becoming aware of the need to look at immigration history within the larger context of North American history. Canadian immigration patterns have been affected, indirectly, almost as much by American immigration policy as by Canadian policy. Within many ethnic groups in North America, there has been a significant exchange of people and cultural patterns between Canada and the United States. Marcus Lee Hansen and John Brebner first looked at the interchange of people between Canada and the United States in their pioneering work, The Mingling of the Canadian and American Peoples, but this study has not been followed up in any concerted way, despite the many gaps they left. Hansen and ...