The period from the late eighteenth to the mid nineteenth century forms a distinctive era in the history of scientific ethnographic writing. A double framework of technological and political change demarcates its beginnings. On the technological side, advances in mathematics and scientific instrument making facilitated accurate navigation over the thousands of miles of a world sea voyage. On the political side, the era opens with the British victory over the French in the Seven Years' War (in its North American theater, the French and Indian War), which was ratified by the Treaty of Paris, signed in 1763. This conclusion to one contest set off a new round of competition between the two great powers, who now played out their rivalry in the vast, hitherto imperfectly charted expanse of the Pacific.