Qiaopi is the name given in Chinese to letters written home by Chinese emigrants to accompany remittances, in the 150 years starting in the 1820s. Qiaopi had numerous functions and dimensions, ranging from economic and social to cultural and political. In June 2013, the Qiaopi Project was officially registered under UNESCO's "Memory of the World" programme, set up in 1992 because of "a growing awareness of the parlous state of preservation of documentary heritage" in the world. This book presents around one hundred letters from Singapore, China, Malaysia, Thailand, the USA, and Canada, including photographic reproductions of the original letters, transcriptions in Chinese characters, and English translations, where necessary with explanatory notes. Most of the letters collected in Chinese and non-Chinese archives, and in this sourcebook, were products of the Qiaopi system as traditionally defined. A few, especially some to and from North America, especially in the second half of the twentieth century, went through the Post Office, and were not handled by Chinese remittance companies. Not all the letters accompanied remittances.