 Ross attained the rank of captain on his return to Scotland and about this time built the house North West Castle, in Stranraer, south-west Scotland.Parry, his lieutenant on the previous expedition, returned to the Arctic in 1819, and sailed west beyond the "Croker Hills", thereby discovering the Parry Channel – the main axis of the Northwest Passage.Partly to redeem his reputation, Ross proposed to use a shallow-draft steamship to break through the ice.