In 1886, an Anglo-German agreement partitioned the "unclaimed" central Pacific, leaving Nauru in the German sphere of influence, while Ocean Island and the future GEIC wound up in the British sphere of influence. In 1892, local Gilbertese authorities (an "uea", a chief from the Northern Gilbert Group, and "atun te boti" or head of clan) on each of the Gilbert Islands agreed to Captain E.H.M. Davis commanding HMS "Royalist" of the Royal Navy declaring them part of a British protectorate, along with the nearby Ellice Islands. They were administered by a resident commissioner based first on Makin Islands (1893–95), then in Betio, Tarawa (1896–1908) and Ocean Island (1908–1942), protectorate who was under the Western Pacific High Commission based in Fiji. Banaba, known to Europeans as Ocean Island, was added to the protectorate in 1900, because of the phosphate rock of its soil (discovered in 1900). This discovery and the mining ended the contracting of Kanakas workers to farm plantations in Queensland, German Samoa or Central America, with all the needed workers being used in Ocean Island extraction.