It is proposed in the present essay to give a brief outline, based on linguistic evidence only, of the state of civilization attained by the Tibeto-Burman race previous to the migration of the great Southern branch, and also to throw some light on the probable time of that migration. Of course, in all such inquiries anthropological evidence is now, and rightly, held to be a much more trustworthy guide than facts derived from the comparison of two or more languages, but results obtained from philological data alone are by no means to be altogether contemned. In the present case the geological exploration of the two countries is practically in its infancy, whilst even in Burma physical measurements of the population have not yet been systematically undertaken. It is clear, therefore, that we shall have to wait a quite indefinite time before any anthropological data are forthcoming. So far as is known, however, both the physical type and the idiosyncrasy of the two peoples are remarkably similar, and thus there is little fear that in comparing their languages we shall be trespassing against the canons of ethnology, for language and race are here, I think, nearly coterminous. All Tibetan or Burmese speaking people are not, of course, ethnically Tibetans or Burmans, but there can be no doubt that the bulk of them are, and that formerly they constituted but one race on the high plateau north of the Himalaya. The anthropological evidence, so far as it goes, points that way, whilst the linguistic evidence is overwhelming.