Analysis of information sources in references of the Wikipedia article "Ilhas Salomão do Norte" in Portuguese language version.
[...] To protect their own interests, Germany and Britain divided the Solomons between them in 1886; but in 1899 Germany transferred the northern islands, except for Buka and Bougainville, to Britain (which had already claimed the southern islands) in return for recognition of German claims in Western Samoa (now Samoa) and parts of Africa. The British Solomon Islands Protectorate was declared in 1893 [...]
[...] The Marshall Islands and the northern Solomon Islands (Buka, Bougainville and other islands) were annexed in 1885.
