The records of the Amazon-Manhattan Mining Company span the years 1917 to 1941, with the bulk of the material covering the years 1917 to 1925. Included are financial statements, correspondence with suppliers and stockholders, annual statements and reports to state agencies, stock ledgers and journals, cancelled stock certificates, assessment records, lists of stockholders, financial ledgers and journals, vouchers, check registers, and tax returns.

Related materials can be found in the records of Henry Day and the Monitor Mining Company.