American Fur Company Records,
The American Fur Company was founded in 1808 by John Jacob Astor (1763-1848). It eventually held a monopoly on fur trade throughout the Great Lakes, with the Company head quarters in Mackinac and a branch in Detroit, Michigan. The Company dealt in trade goods, fining, ore transportation, and other related business interests. Astor sold out his shares in 1834 to Ramsay Crooks. The Company went bankrupt in 1847.