The caravans travelled far beyond the limits of the empire.
Caravans from Sus laden with copper-ware, olive oil, butter, saffron, wax, skins, dates, dried roses, &c., are sent to Marrakesh, four days' journey from Tarudant.
Traffic is carried on principally by means of caravans of camels, horses, asses and oxen.
An active trade was carried on by means of caravans, corn and silk especially being mentioned at a very early date.
It is served by dug-outs, three in number in 1899, and capable of carrying about fifteen men on a trip. Formerly the trade was very considerable, and the Burmese had a customs station on the island, from which the place takes its name; but the rebellion in the great state of Theinni, and the southward movement of the Kachins, as well as the Mahommedan rebellion in Yunnan, diverted the caravans to the northern route to Bhamo, which is still chiefly followed.