The business and financial series (1908-1982) contains the family’s business and financial records. The series centers on Leonard’s files on the family's real estate properties within Boggs building, located in downtown Las Vegas, his Quality Bakery storefront, and family businesses, such as the Fayle Hotel (Goodsprings Hotel) and their grocery store. The series also contains financial documents, insurance policies, and stock in various companies.

The mining series (1902-1998) documents the family’s mining interests and records. The series focuses on the family’s involvement in Nevada mines, such as the Yellow Pine Mining Company, the Root Zinc Mining Company, and the Columbia, St. Anthony, and St. Patrick mines, which include surveys, field notes, patents, journals, ledgers, maps of the mining sites, and correspondence. The series also contains similar documents for various mines and potential mining sites, as well as the family’s legal files.