 This causes early tensions in the preparatory stages.While the preliminary dig is ongoing Ross shoulders much responsibility including keeping the aircraft safe in a tidal zone.Worn out with the expedition's work – all of which has fallen solely on him – and a prolonged lack of sleep induced by worry over the expedition, he enters a coma induced by the sleeping tablets he has been forced to take to keep going, and in it dreams that he and Alix were once Scottish slaves aboard Leif Ericson's vessel on its voyage of discovery to Greenland.