Afterward, Hudson's Bay was repeatedly visited by English navigators whose discoveries all went to confirm the prevailing belief in an open polar sea. One of them even took a letter from his own king for the Emperor of Japan. In view of the suffering to which all were alike subject, these "frost-biting voyages" might be said to show more heroism than sound practical wisdom, yet with the riches of the Indies spread out before their fancy, and all England to applaud their deeds, the best of England's sailors were always ready to peril life and limb for the prize. All who came back told the same tale,—of seas sheeted in ice, suns that never set, lands where nothing grew, cold so extreme that all nature seemed but a mockery of the all-wise design of the Creator Himself. [Illustration: ABANDONED HUT, NORTH-WEST COAST.] Sir Thomas Button followed up Hudson's discoveries in 1612. He wintered at the mouth of Nelson's River, so named by him, after finding farther progress to the westward barred by the coast, where he had hoped to find it opening before him. It was soon found that the bleak and desolate region enclosing Hudson's Bay was rich in fur-bearing animals, whose skins bore a great price in Europe, and the reports brought back from that far-off land gave a certain Frenchman named Grosselier the idea of planting a fur-trading colony there. He at once went to the minister with his plan. The minister, however, would not listen to him. Grosselier then went to Prince Rupert,[2] who was staying at Paris, to ask for the aid he wanted. Struck with the scheme, the prince became its patron. A ship was sent out, with Grosselier, in 1668, which reached the head of James' Bay,[3] where Fort Charles was built. The next year, Prince Rupert, and seventeen others, were incorporated into a company, with power granted them to make settlements and carry on trade in Hudson's Bay. In this way the since famous Hudson's Bay Company obtained a monopoly of the fur-trade of all that region, which afterward proved so valuable to it. Its powers were most ample. It could hold and convey land, fit out ships, erect forts, or make war with the peoples of that country, but all this was to be done in its character as a trading-company; and though it had a resident governor, the central authority was kept in the company, in London, who continued to direct its affairs. In the earlier years of its existence the Hudson's Bay Company had a hard struggle for life. We know that French traders formerly had dealings with the natives of that dreary inland sea. Jealousy now prompted them to try to drive the English thence by force, and so get rid of their rivalry. To this end repeated attacks were made upon the English factories,[4] which were taken and retaken, first by one and then by another assailant. Even in time of peace the French had not scrupled to assault these remote posts, so unwilling were Canadians to see the English gain a foothold in that quarter.