'Global' knowledge was constructed, communicated and contested during the long nineteenth century in numerous ways and places. This book focuses on the life-geographies, material practices and varied contributions to knowledge, be they medical or botanical, cartographic or cultural, of actors whose lives crisscrossed an increasingly connected world. Integrating detailed archival research with broader thematic and conceptual reflection, the individual case studies use local specificity to shed light on global structures and processes, revealing the latter to be lived and experienced phenomena rather than abstract historiographical categories. This volume makes an original and compelling contribution to a growing body of scholarship on the global history of knowledge. Given its wide geographic, disciplinary and thematic range this book will appeal to a broad readership including historical geographers and specialists in history of science and medicine, imperial history, museum studies, and book history.