The life of Lao-tzŭ, like the book which he wrote, is enveloped in mystery; and one might almost be excused for doubting whether such a person ever actually existed. One author, indeed, has even gone the length of saying that Lao-tzŭ was made out of space or vacuity (_hung_ 洪).[1] The most reliable account of him which has come down to us is that by Szŭ Ma-chien, or Sze-ma-thsien (司馬遷), in the _Shi-chi_ (史記), and this is very brief and unsatisfactory. We have also occasional notices of him in other old books, but the stories told about him in the Records of Spirits and Fairies and works of a like nature are, as Julien observes, only a tissue of falsehoods which all sensible men reject. Szŭ Ma-chien says[2] Lao-tzŭ was a native of the hamlet Chʽü-jen (曲仁) of the parish Lai or Li (厲) in the district Kʽu (苦), a town of the state Chu (楚): his surname was Li (李), his name Êrh (耳), his style Po-yang (伯陽) and his posthumous designation Tan (聃).[3] He was in office at the court of Chou 周 as Shou-tsang-shĭ-chĭ-shĭ (守藏室之史), which Julien translates “gardien des archives.” I have been unable to obtain from Chinese sources any reliable statement as to the date of Lao-tzŭ’s birth; though Pauthier[4] asserts positively that he was born on the 14th day of the 9th moon, in the year B.C. 604. In this he is followed by Julien, who, however, says candidly—“cette date (the 3rd year of king Ting 定 of the Chou dynasty, corresponding to B.C. 604) que nous inserons ici, est conforme a la tradition historique la mieux établie mais elle ne se trouve point dans la notice du Sze-ma-thsien dont nous donnons la traduction.”[5] There is nothing improbable in this date, as we know from other sources that Lao-tzŭ was a contemporary of Confucius, though very much his senior; and as Confucius was born about B.C. 550, Lao-tzŭ must apparently have been born about the beginning of the sixth century B.C. The latter sage indeed, is usually represented as having attained to a very great age, and as having been alive much more than fifty years before the birth of Confucius. Chʽao, a well known author, quoted by Ma Tuan-lin, says that it was in the forty-second year of the reign of king Pʽing (平王) that Lao-tzŭ gave his book to the keeper of the Pass.[6] This-would carry him up to the eighth century B.C., king Pʽing having commenced to reign about the year B.C. 770. Others[7] mention two teachers of Tao (道) as having lived during the Chou dynasty, one Lao-tan (老聃) and another named Lao-lai-tzŭ (老萊子). It is by the name Lao-tan that Confucius usually refers to Lao-tzŭ, while later authors often use his surname Li or his name Êrh. It must be remembered also that the Lao-tan mentioned by Confucius is regarded by a few commentators as a different person from the author of the _Tao-tê-ching_.