How did Stephen Grove make his money?

Bank of Kampsville 7 BankTennessee 4 CALIFORNIA Bank OF CMRC National Association 13 DAYSPRING Bank 15 Eastern National Bank 3 FIDELITY Bank 26 FIRST CENTURY Bank National Association 10 First Federal Savings & Loan Bank 9 Great Plains Bank 9 Huron Valley State Bank 3 Independent Farmers Bank 1 Jackson Parish Bank 5 Mechanics & Farmers Bank 2 QUAIL CREEK Bank 2 Saint Martin National Bank 4 Select Bank 8 State Bank of Bement 3 Swedish-American State Bank 14 Warrington Bank 20 Waumandee State Bank 13