Records of Rio Tinto Company Limited including memorandum and articles of association; minutes of the board and committees; annual reports and accounts; seal registers; papers relating to shares; letter books; subject files concerning the company and its operations; records of the chairman, directors, overseas department and technical department; financial papers; records of the Madrid office; letter books relating to the Spanish mines; plans of head offices and mines; printed material and photographs of operations in Spain.
Records of The Pyrites Company Limited have also been catalogued. These records include board minutes, directors' attendance books, register of directors' holdings, papers relating to The Pyrites Company Incorporated, register of members and share ledger, ledgers, accounts, agreements and contracts to supply pyrites, photographs of Wilmington Plant, and staff books.
Records of other companies under Rio Tinto plc are uncatalogued and require prior notice to be ordered. Main companies represented are: A.G. Exploration Company Limited, Anglo-Peruvian Alluvials Limited, Borax Europe Limited, Borax Consolidated Limited, Borax Holdings Limited, Borax Limited, Borax International Limited, Borax Research Limited, Borax Overseas Holdings Limited, The Cam and Motor Gold Mining Company (1919) Limited, Consolidated Zinc Company Limited, Imperial Smelting Corporation Limited, Luzenac UK Limited, Mineral Properties Investigations limited, N.S.C. London, The Pyrites Company Incorporation, Rio Tinto Australian Holdings Limited, Rio Tinto Technology Development Limited, Rio Tinto Minerals Limited, Rio Tinto Metals Limited and The Zinc Corporation Limited.