“…Further, while Rattus exulans certainly accompanied Lapita migrations, either or both as a stowaway or because it was a useful emergency food, there is a growing list of cases where it seems to arrive later. In a 3,000 year long sequence from Palau, no bone of Rattus exulans is apparent (Clark 2005), but it occurs about 1000 BP in an 1,800 year long sequence at Utrok Atoll, in the Marshall Islands (Weisler 2001). Rattus exulans also arrived quite late in the Marianas, about 1,200-1,000 years ago (Steadman 1999) (White et al 2000).…”