Rotuma is made up of two volcanic landmasses connected by a sandy isthmus, on which Motusa is located.
Motusa is about one kilometer southwest of Ahau, the government station, which is also the location of the island's post office, and a small hospital.
Ahau is now the administrative center of Rotuma, although for a long time Motusa, being the largest settlement, and one of the best moorings, was the centre of most business transactions and industry.
Christian missionaries backed by their respective nations (the Catholic French and Protestant Wesleyan British) exacerbated the pre-existing strained relationship between Motusan chiefs.
It was attended by Fiji's colonial governor William Des Vœux and the high chiefs of the seven districts of Rotuma.