The drainage of Manitoba is entirely northeastward to Hudson Bay.
The region of the Red River and Assiniboine valleys was opened up by the fur traders, who came by the waterways from Lake Superior, and afterwards by the water communication with Hudson Bay.
The Hudson Bay Company had been in- Arctic corporated in 1670, and its servants soon extended their operations over a wide area to the north and west of Canada.
In 1741 Captain Christopher Middleton was ordered to solve the question of a passage from Hudson Bay to the westward.
In November 1769 Samuel Hearne was sent by the Hudson Bay Company to discover the sea on the north side of America, but was obliged to return.