North Solomon Islands between Bougainville (an autonomous region of Papua New Guinea) and the sovereign state of Solomon Islands, which is the successor state to the British Solomon Islands Protectorate renamed in 1975 prior to achieving independence in 1976. On 17 February 1568, the archipelago was discovered by Spanish explorer Alvaro de Mendaña y Neyra, who named its "Islas de Salomon". In April 1885 a German protectorate ("Schutzgebiet") was declared over the northern Solomon Islands: Bougainville, Buka, Choiseul, Santa Isabel and Ontong Java. In 1893 the British declared a protectorate over the southern Solomon Islands of New Georgia, Guadalcanal, Malaita and San Cristobal,
Choiseul Sound Choiseul Sound Choiseul Sound is a stretch of sea in the Falkland Islands. It runs parallel to Eagle Passage and is between Lafonia and the north of East Falkland. Lively Island is in its mouth. At its entrance, on the northern shore, is the Bertha's Beach Important Bird Area which is also a Ramsar site, recognising it as a wetland of international importance. It was named by Louis de Bougainville after the French Foreign Secretary, Étienne François, duc de Choiseul. The name is pronounced "Chisel" in Falkland Islands dialect. (Richard Munro, Place Names of the Falkland Islands, 1998, p. 18.)