Abstract The Butte and Superior Copper Company check register (1906-1911) records financial transactions in this mining company's general account at the First National Bank of Duluth, Minnesota. The Butte and Superior Copper Company, Ltd., was organized in the year 1906 and began development operations in 1907. J. B. Becher was the trustee at that time, and the transactions recorded in this register are in his own handwriting. The basis of this company's development was a group of claims embracing about...