evidence: Equatorial Guinea is comprised of a mainland territory known as Río Muni (including several offshore islands); the island of Bioko (formerly Fernando Pó), where the capital, Malabo (formerly Santa Isabel) is located; and the island of Annobón in the South Atlantic Ocean. It is bordered by Cameroon on the north, Gabon on the south and east, and the Gulf of Guinea on the west, where the island nation of São Tomé and Príncipe is located. [...] The Muni and Ntem rivers, on the south and north boundaries of Río Muni, are estuaries navigable for about 12 miles (20 km); the Mbini River, midway between them, is typical of the cascading streams that drain all of Río Muni. Bioko has short cascading streams; Annobón has only storm arroyos. [...] - Kié-Ntem Province (Ebebiyín)