It is well known that amongst the Buddhist Scriptures there is one book in which a large number of old stories, fables, and fairy tales, lie enshrined in an edifying commentary; and have thus been preserved for the study and amusement of later times. How this came about is not at present quite certain. The belief of orthodox Buddhists on the subject is this. The Buddha, as occasion arose, was accustomed throughout his long career to explain and comment on the events happening around him, by telling of similar events that had occurred in his own previous births. The experience, not of one lifetime only, but of many lives, was always present to his mind; and it was this experience he so often used to point a moral, or adorn a tale. The stories so told are said to have been reverently learnt and repeated by his disciples; and immediately after his death 550 of them were gathered together in one collection, called the Book of the 550 Jātakas or Births; the commentary to which gives for each Jātaka, or Birth Story, an account of the event in Gotama’s life which led to his first telling that particular story. Both text and commentary were then handed down intact, and in the Pāli language in which they were composed, to the time of the Council of Patna (held in or about the year 250 B.C.); and they were carried in the following year to Ceylon by the great missionary Mahinda. There the commentary was translated into Siŋhalese, the Aryan dialect spoken in Ceylon; and was re-translated into its present form in the Pāli language in the fifth century of our era. But the text of the Jātaka stories themselves has been throughout preserved in its original Pāli form. Unfortunately this orthodox Buddhist belief as to the history of the Book of Birth Stories rests on a foundation of quicksand. The Buddhist belief, that most of their sacred books were in existence immediately after the Buddha’s death, is not only not supported, but is contradicted by the evidence of those books themselves. It may be necessary to state what that belief is, in order to show the importance which the Buddhists attach to the book; but in order to estimate the value we ourselves should give it, it will be necessary by critical, and more roundabout methods, to endeavour to arrive at some more reliable conclusion. Such an investigation cannot, it is true, be completed until the whole series of the Buddhist Birth Stories shall have become accessible in the original Pāli text, and the history of those stories shall have been traced in other sources. With the present inadequate information at our command, it is only possible to arrive at probabilities. But it is therefore the more fortunate that the course of the inquiry will lead to some highly interesting and instructive results.