European science is indebted to Dr. M. A. Stein's industry for the remarkable document here published. It is one of the many valuable MSS. which fell to his lot through the partial acquisition in 1907 of an ancient library discovered, by a Chinese priest, in one of the Buddhist cave temples of the “Halls of the Thousand Buddhas” to the south-east of the Tun-huang oasis, as described by him in the Geographical Journal for September, 1909. Its excellent state of preservation, and the fact of its being written in the clear unequivocal letters of the Manichæan alphabet, renders this MS. a most valuable help to all interested in the study of the ancient Turkish speech in which it is edited.