A century ago, two families, one from Belfast and the other from Hilltown, County Down, emigrated from what is now Northern Ireland to Toronto, Canada. Years later, a member of each family met and married. They had four daughters and a son. No one from either side returned to visit their homeland until 2011, when the four sisters and two of their husbands (including me), gathering from their respective homes in Toronto, North Carolina, Nebraska and Arizona, met in Belfast for a 7-day family...