Radisson, conceiving himself to be badly treated by the French Governor of Canada, crossed over to England with his brother-in-law, Chouart, and the two were warmly taken up by Prince Rupert of Bavaria, the cousin of Charles II.
They were sent out by Prince Rupert in command of an expedition financed by him and a number of London merchants, and in 1669 the New England captain, Gillam, returned to England with Chouart and the first cargo of furs from Hudson's Bay.

This cargo so completely met the expectations of those who had promoted the venture that it led in 1670 to the foundation of the Governor and Company of Adventurers of England trading into Hudson's Bay, a company chartered by Charles II and presided over by Prince Rupert, and an association which proved to be the germ of British North America, of the vast three-quarters of the present Dominion of Canada..