It was no easy task for M. Barthélemy Saint-Hilaire to make himself acquainted with all these works. The study of Buddhism would almost seem to be beyond the power of any single individual, if it required a practical acquaintance with all the languages in which the doctrines of Buddha have been written down. Burnouf was probably the only man who, in addition to his knowledge of Sanskrit, did not shrink from acquiring a practical knowledge of Tibetan, Pâli, Singhalese, and Burmese, in order to prepare himself for such a task. The same scholar had shown, however, that though it was impossible for a Tibetan, Mongolian, or Chinese scholar to arrive, without a knowledge of Sanskrit, at a correct understanding of the doctrines of Buddha, a knowledge of Sanskrit was sufficient for entering into their spirit, for comprehending their origin and growth in India, and their modification in the different countries where they took root in later times. Assisted by his familiarity with Sanskrit, and bringing into the field, as a new and valuable auxiliary, his intimate acquaintance with nearly all the systems of philosophy and religion of both the ancient and modern worlds, M. Barthélemy Saint-Hilaire has succeeded in drawing a picture, both lively and correct, of the origin, the character, the strong as well as weak points, of the religion of Buddha. He has become the first historian of Buddhism. He has not been carried away by a temptation which must have been great for one who is able to read in the past the lessons for the present or the future. He has not used Buddhism either as a bugbear or as a _beau idéal_. He is satisfied with stating in his preface that many lessons might be learned by modern philosophers from a study of Buddhism, but in the body of the work he never perverts the chair of the historian into the pulpit of the preacher.