The author of the Periplus informs us, that raw as well as manufactured silk were conveyed by land through Bactria, to Baraguza or Guzerat, and by the Ganges to Limurike; according to this first route, the silks of China must have come the whole length of Tartary, from the great wall, into Bactria; from Bactria, they passed the mountains to the sources of the Indus, and by that river they were brought down to Patala, or Barbarike, in Scindi, and thence to Guzerat: the line must have been nearly the same when silk was brought to the sources of the Ganges; at the mouth of this river, it was embarked for Limurike in Canara. All the silk, therefore, that went by land to Bactria, passed down the Indus to Guzerat; all that deviated more to the east, and came by Thibet, passed down the Ganges to Bengal. A third land route by which silk was brought to the Persian merchants, and by them sold to the Romans, was from Samarcand and Bochara, through the northern provinces of China, to the metropolis of the latter country: this, however, was a long, difficult, and dangerous route. From Samarcand to the first town of the Chinese, was a journey of from 60 to 100 days; as soon as the caravans passed the Jaxartes, they entered the desert, in which they were necessarily exposed to great privations, as well as to great risk from the wandering tribes. The merchants of Samarcand and Bochara, on their return from China, transported the raw or manufactured silk into Persia; and the Persian merchants sold it to the Romans at the fairs of Armenia and Nisibis. Another land route is particularly described by Ptolemy: according to his detail, this immense inland communication began from the bay of Issus, in Cilicia; it then crossed Mesopotamia, from the Euphrates to the Tigris, near Hieropolis: it then passed through part of Assyria and Media, to Ecbatana and the Caspian Pass; after this, through Parthia to Hecatompylos: from this place to Hyrcania; then to Antioch, in Margiana; and hence into Bactria. From Bactria, a mountainous country was to be crossed, and the country of the Sacæ, to Tachkend, or the Stone Tower. Near this place was the station of those merchants who traded directly with the Seres. The defile of Conghez was next passed, and the region of Cosia or Cashgar through the country of the Itaguri, to the capital of China. Seven months were employed on this journey, and the distance in a right line amounted to 2800 miles. That the whole of this journey was sometimes performed by individuals for the purchase of silk and other Chinese commodities, we have the express testimony of Ptolemy; for he informs us, that Maes, a Macedonian merchant, sent his agent through the entire route which we have just described. It is not surprising, therefore, that silk should have borne such an exorbitant price at Rome; but it is astonishing that any commodity, however precious, could bear the expence of such a land carriage.