James Cook’s voyages of exploration are a turning point not only in the history of the British Empire, but also in the history of science and exploration of the Pacific. The last decades have seen a wide-ranging scholarly interest in Cook’s voyages, focusing on their impact on European and Polynesian societies, their scientific results, and their protagonists, such as Cook himself or the nobleman Joseph Banks who took part in Cook’s first voyage of exploration. This book examines the hitherto underestimated role of the German scholar Johann Reinhold Forster who, together with his son Georg Forster, accompanied Cook on his second voyage of exploration (1772–1775) as a principal naturalist. For a long time, the German traveler has remained a rather shadowy figure of Cook’s voyages of exploration and has only attracted scholarly attention occasionally. Focusing on the making of knowledge onboard the ship and the islands where it made landfall, the study provides a historical reappraisal of Forster’s scientific performance as a leading naturalist of his time. By examining Forster’s Resolution Journal, Anne Mariss takes a microhistorical approach toward the making of natural history knowledge during the expedition to the Pacific. Mariss unveils the difficulties the traveling naturalists encountered while collecting, describing, classifying, and painting the natural world. Her study brings to light the contribution of the various actors who were involved in this undertaking, such as the scientific assistants, sailors, officers, and the local actors of the Pacific world.