with William Edgar (1736-1820) at Detroit. In the Niagara Region, it was said he started trading in deerskins and muskrats, and only later became involved with the more valuable furs. Over the next few years, McTavish prospered in the trading of furs, and in 1773, with a new partner, James Bannerman, he extended his operations to Grand Portage on Lake Superior. At that important fur trade rendezvous, while other American traders concentrated on the south and west, McTavish understood that he would have access to fur pelts that were found in much greater quantity and were of better quality in the colder climate north west of the Great Lakes. Although at the time the Hudson's Bay Company controlled the prime north-westerly areas for fur trapping, there was still a relatively lucrative route from Montreal westward via the Ottawa River and out across Georgian Bay and the Great Lakes Region and into Manitoba. Most of the trade at Grand Portage went through Montreal. In 1775–76, McTavish had the great fortune to winter at Detroit, well stocked with trade goods for the next season, he made an expedition with George McBeath. The American Continental Army occupied Montreal that winter, preventing the Montreal traders from getting their goods to Grand Portage in the summer of 1776. This enabled McTavish, with little competition, to obtain furs which he valued at £15,000 and took to England to sell in a high market. Montreal In the meantime, the Americans had withdrawn from Quebec, and McTavish transferred his operations to Montreal. He continued to trade on his own through the Revolutionary War, supplying goods both at Grand Portage and Detroit, and speculating in rum for the British soldiers at Detroit and Niagara. By the end of the war, he was able to put together a group of business investors and trapper/explorers to create the North West Company. With the Frobisher brothers he owned 37.5% of the company's shares and upon the death of Benjamin Frobisher in 1787 McTavish became the man in charge of the business. A restructuring of the company a few months later saw the shrewd McTavish gain control of eleven of the company's twenty shares. Most important, he was managing partner of a new Montreal firm, McTavish, Frobisher and Company, which imported the North West Company's goods and forwarded its furs to the London market, taking commissions on all transactions. The vertical integration of