Easter Island was annexed by Chile on 9 September 1888 by Policarpo Toro by means of the "Treaty of Annexation of the Island" (Tratado de Anexión de la isla). Toro, representing the government of Chile, signed with Atamu Tekena, designated "King" by the Roman Catholic missionaries after the paramount chief and his heir had died. The validity of this treaty is still contested by some Rapa Nui. Officially, Chile purchased the nearly all encompassing Mason-Brander sheep ranch, comprised from lands purchased from the descendants of Rapa Nui who died during the epidemics, and then claimed sovereignty over the island.