A valuable merchandise of small bulk is capable of defraying the expense of land-carriage; and the caravans traversed the whole latitude of Asia in two hundred and forty-three days from the Chinese Ocean to the sea-coast of Syria. Silk was immediately delivered to the Romans by the Persian merchants, 67 who frequented the fairs of Armenia and Nisibis; but this trade, which in the intervals of truce was oppressed by avarice and jealousy, was totally interrupted by the long wars of the rival monarchies. The great king might proudly number Sogdiana, and even Serica, among the provinces of his empire; but his real dominion was bounded by the Oxus and his useful intercourse with the Sogdoites, beyond the river, depended on the pleasure of their conquerors, the white Huns, and the Turks, who successively reigned over that industrious people. Yet the most savage dominion has not extirpated the seeds of agriculture and commerce, in a region which is celebrated as one of the four gardens of Asia; the cities of Samarcand and Bochara are advantageously seated for the exchange of its various productions; and their merchants purchased from the Chinese, 68 the raw or manufactured silk which they transported into Persia for the use of the Roman empire. In the vain capital of China, the Sogdian caravans were entertained as the suppliant embassies of tributary kingdoms, and if they returned in safety, the bold adventure was rewarded with exorbitant gain. But the difficult and perilous march from Samarcand to the first town of Shensi, could not be performed in less than sixty, eighty, or one hundred days: as soon as they had passed the Jaxartes they entered the desert; and the wandering hordes, unless they are restrained by armies and garrisons, have always considered the citizen and the traveller as the objects of lawful rapine. To escape the Tartar robbers, and the tyrants of Persia, the silk caravans explored a more southern road; they traversed the mountains of Thibet, descended the streams of the Ganges or the Indus, and patiently expected, in the ports of Guzerat and Malabar, the annual fleets of the West. 69 But the dangers of the desert were found less intolerable than toil, hunger, and the loss of time; the attempt was seldom renewed, and the only European who has passed that unfrequented way, applauds his own diligence, that, in nine months after his departure from Pekin, he reached the mouth of the Indus. The ocean, however, was open to the free communication of mankind. From the great river to the tropic of Cancer, the provinces of China were subdued and civilized by the emperors of the North; they were filled about the time of the Christian aera