David Thompson arrives at Hudson's Bay as a 14 year old apprentice.
greatest map making astronomer of his era, David Thompson, arrives
at a trading post near Hudson's Bay after a grueling four month
voyage from England. Thompson was taken on as an apprentice
by the Hudson Bay Company because he was a precocious 14 year-old
orphan with a natural aptitude for mathmatics. During his
first long winter at the outpost on Hudson's Bay, Thompson was
taught the arts of celestial naviagtion, astonomy, and geography -
skills that soon launched his legendary career mapping the
wilderness of the American West. Eventually, he located the
headwaters of the Columbia River basin, a network of wild,
mountainous rivers that covered an area the size of France.