Douglas Wile translates and analyzes four collections of recently released nineteenth-century manuscripts on T'ai-chi ch'uan. These writings of Wu's older brothers Ch'eng-ch'ing and Ju-ch'ing, and his nephew Li I-yu, together with the transmissions of Yang Pan-hou, represent a significant addition to the seminal literature. The rich new texts allow us to make a fresh survey of longstanding issues in T'ai-chi history: the origins of the art; the authorship of the "classics"; the differences between Wu, Yang, and Li; and the roles of Chang San-feng, Wang Tsung-yueh, Chiang Fa, and the formerly missing link, Ch'ang Nai-chou. The original Chinese texts of the four new sets of classics have been appended for the convenience of Chinese readers and scholars.