Correspondence, telegrams, reports, contracts, financial papers, notices and minutes of meetings, returns, newspaper cuttings, maps and publications relating to sugar and rubber plantations in the Straits Settlements and Malaya. They document: the activities of the Penang Sugar Estates Co; Penang Rubber Estates Co; Straits Sugar Co; Straits Rubber Co; Rubana Rubber Estates Co; Bagan Serai Co; Batak Rabit Estate Ltd; Selaba Rubber Estates Ltd; Tali Ayer Rubber Estates Ltd; and Sabrang Rubber Estates Ltd. The bulk of the records is dated 1875-1925.