Sultan Jamalul Alam granted rights in North Borneo to Overbeck and Dent. The related commission appointed Overbeck Datu Bandahara and Raja of Sandakan, with powers of government derived from the Sultan.
Sources & further reading
01
The History of Sulu (1908)
Bureau of Printing, Manila · Project Gutenberg
Najeeb M. Saleeby, The History of Sulu (Manila: Bureau of Printing, 1908), royal genealogies and pp. 161–164, 225–226. Project Gutenberg, ebook 41771.
02
British Borneo (1891)
Government Printing Department, Singapore · Project Gutenberg
W. H. Treacher, British Borneo: Sketches of Brunai, Sarawak, Labuan, and North Borneo (Singapore: Government Printing Department, 1891), chapter I, pp. 4–5, and chapter VII, pp. 92–103.