The Earl George Macartney Collection launches this month in Archives Unbound. It is a new digitisation of a fascinating resource – letters, books, sketches and journals relating to the important Macartney mission from George III to the Chinese Emperor Qianlong in 1792–1794. The Charles Wason Collection at Cornell is the largest collection of material on this event held in one place, covering a period from 1784 to 1916. This valuable piece of Anglo-Chinese history is now available in Gale’s Archives Unbound programme, where it sits alongside collections such as Papers of the British Consulates and Legation in China (1722–1951), the Chinese Recorder and the Protestant Missionary Community in China, 1867–1941. Below Dr Liren Zheng, curator of the collection at Cornell University Library, explains the importance of both the eighteenth-century mission and the accumulation of this material into one holding.