The largest island of the Bismarck Archipelago, southwestern Pacific, in Papua New Guinea. Archaeological discoveries include stone pestles and mortars like those from the New Guinea Highlands, an undated industry of waisted flaked tools from Kandrian, and the first discovered Lapita site (Watom Island. The Talasea obsidian source, the most important in the southwestern Pacific and quarried since at least 9000 BC, is on New Britain. The island was probably settled by Papuan-speakers from New Guinea before 9000 BC.