This collection includes the original incorporation proclamation from the state of California for the West Ontario Mutual Water Company, stock certificates (issued and unissued), minute books of stockholder’s meetings, cancelled checks and other financial papers from South Side Mutual Water Comapany's principal checking account with First National Bank of Ontario, invoices for diesel and gas to run the water pumps, monthly accounts of water used per shareholder, county property tax returns, and state and federal corporate tax returns.