In Companions in Geography Mario Cams revisits the early 18th century mapping of Qing China, without doubt one of the largest cartographic endeavours of the early modern world. Commonly seen as a Jesuit initiative, the project appears here as the result of a convergence of interests among the French Academy of Sciences, the Jesuit order, and the Kangxi emperor (r. 1661-1722). These connections inspired the gradual integration of European and East Asian scientific practices and led to a period of intense land surveying, executed by large teams of Qing officials and European missionaries. The...