The Castle Mountain Cattle and Sheep Company Records consist of general correspondence, printed materials, legal documents, land and livestock papers, and organizational and financial records. Series have been assigned according to activity and function. General correspondence were kept primarily by ranch managers and refer to ranch operations and business. Printed Materials contains published documents collected by the Castle Mountain Cattle and Sheep Company. A number of these articles refer to the history and/or accomplishments of the Donahoe family and their ranch. The Livestock and Land series contains official certificates and registers for cattle and sheep as well as legal documents such as land deeds and mining claims. The ranch's Organizational Records contain articles of incorporation and company by-laws, stock share certificates and minute books for both the Castle Mountain Ranch and the Butte Brewing Company. Employee Records refer to insurance records for employee liability and Social Security filings. Employee names and payroll ledgers have been placed in the following series of Financial Records. Financial Records contains ledgers, account books, tax returns and banking records. The managers of the Castle Mountain Ranch collected documents significant to financial records, such as correspondence, receipts and relevant newspaper clippings, and placed them in yearly files labeled "Accounts." Many of these files remain in their original order. Any oversize documents, maps, machinery specs, etc. have been placed in oversize storage.
The William Gaddis Papers consist of a painstakingly prepared 1963 typescript of a 599 page financial journal that documents transactions at the Camp Baker (Fort Logan) trading post between 1871 and 1876. The original financial journal volume, has been assigned collection number SC 219 at the Montana Historical Society in Helena. Most of the customers listed in the financial journal appear to be officers or enlisted men of the garrison, and their purchases include sundry items, tobacco, alcohol, and games of pool. Also included are business letters written to William Gaddis and receipts for wholesale goods he purchased.