The first complete chart of the sixteen atolls that make up the Gilbert Islands, now Kiribati, part of Micronesia.

Plate number 26 from the Atlas volume to the 'Hydrographie' of Duperrey's 'Voyage autour du Monde, executé per ordre du Roi, sur la Corvette La Coquille de sa Majesté, pendant les annies 1822, 1823, 1824 et 1825'.
The 'Coquille' "called at Brazil, the Falkland islands, Concepcion, Callao, and Payta. The Pacific islands visited were the Tuamotu Archipelago, Tahiti and the Society Islands, Tonga, Rotuma, the Gilbert and Caroline Islands, and the Bismarck Archipelago. Australia was visited twice, and explorations made of New Zealand and of the Maoris were of particular significance. Vast quantities of ethnographic and scientific data were collected. Before returning to Marseilles, Java, Mauritius, and Ascension were visited" (Hill 517).

At seventeen, Louis-Isidore Duperrey (1786-1865) was a young sub-lieutenant on Louis Freycinet's voyage of 1817-1820, during which the 'Uranie' was wrecked in the Falklands. His own circumnavigation in the 'Coquille' (1822-1825) with its focus on science enabled observations of magnetic variation complementing those made earlier in the Pacific ocean by Freycinet.