The archives of the Royal Greenwich Observatory, held in Cambridge University Library, include the complete run of the surviving papers of the Board of Longitude through the eighteenth century until its abolition in 1828. These papers throw a vivid light on the role of the British state in encouraging invention and discovery, on the energetic culture of technical ingenuity in the long eighteenth century, and on many aspects of exploration and maritime travel in the Pacific Ocean and the Arctic. This project, a partnership between Cambridge University Library, the National Maritime Museum...