In March 187, Nathaniel Wallich, a young Danish surgeon left his home in Copenhagen towards India. During the troubles of the Napoleonic Wars, it was not possible to foresee, that he was to emerge as one of the most?prominent?nineteenth century botanist. Wallich spent most of his adulthood in India and, as the long-time superintendent of the Calcutta Botanic Garden, gained extensive ex­pertise on Indian flora. A truly global communication network emerged from his desk facing the River Hooghly, reaching out to eminent sp­e­cialists as well as amateur researchers long forgotten today. He con­ducted research trips to Nepal, as well as to South East Asia and may be perceived as one of the founding fathers of tea production in Assam. This book is based on the enormous correspondence of Wallich, preserved in libraries across Calcutta, London, Copenhagen, Hamburg, Munich and many other places. About the Author Martin Krieger serves as a professor for Northern European History at the University of Kiel, Germany. His major fields of research are intel­lectual and cultural history and the history of science. He has extensively published on the history of the Baltic Sea region, on global intel­lectual networks and global consumer goods, such as on tea and coffee. \n