In order to recast scholarly understanding of scientific cosmopolitanism during the French Revolution, this essay examines the stories of the natural-history collections of the Dutch Stadholder and the French naturalist Labillardière that were seized as war booty. The essay contextualizes French and British savants' responses to the seized collections within their respective understandings of the relationship between science and state and of the property rights associated with scientific collections, and definitions of war booty that antedated modern transnational legal conventions. The (...) essay argues that the French and British savants' responses to seized natural-history collections demonstrate no universal approach to their treatment. Nonetheless, it contends that the French and British approaches to these collections reveal the emergence in the 1790s of new forms of scientific nationalism that purported to be cosmopolitan – French scientific universalism and British liberal scientific improvement. (shrink)