The Franklin Expedition looms large in Canadian myths and legends, in large part because of what happened to the doomed crews of the HMS Erebus and Terror… or what we think happened.  But at the heart of this story of the Canadian north is an Irishman from Co. Down who lived through the worst that the unforgiving winters had to offer, and then led the survivors as they abandoned the ships and wandered off into the ice.  But who was Francis Crozier, and what do we know about the man at the heart of the mystery?