2 small ruays = 1 large ruay = 1 pice. 4 large ruays = 1 bai or ruay = 1 anna. 2 bais = 1 moo = 2 annas. 2 moos = 1 mat = 4 annas (62½ gr. troy). 4 mats = 1 kyat = 1 tical. 100 kyats = 1 piakthah or vis (3⁶⁵⁄₁₀₀ lbs. avoird.). The head-waters of most of the rivers, as before remarked,[155] yield gold; but gold washings are to be found in the Irawadi above Prome, and also near Rangoon.[156] “But the little gold,” says the missionary, “that is thus collected is far from being sufficient for the Burmese, who use great quantities of this metal, not only in their bracelets, earrings, and other ornaments, which persons of both sexes are accustomed to wear, but much more for gilding the convents of the Talapoins, the public porticoes, and particularly the pagodas, which, being exposed to the rain and the action of the air, soon lose their gilding, and are, therefore, continually requiring fresh gold to repair them. To supply this demand, gold is imported from the Malay coast, from China, and other places.” The silver is principally procured from the Chinese provinces of Yunnan, and the mines in Burmah are worked by natives of China. The only place in Burmah where silver-mines are worked is at Bor-twang, twelve days’ journey from Bamoo. Burmah has considerable foreign trade. The natives carry on a communication for this purpose with Mergui and Chittagong, and occasionally with Calcutta, Penang, and Madras. Burmah has at present but two good harbours remaining, namely, Rangoon and Bassein. Both of these are good, but foreign vessels never go to the latter, notwithstanding the fact that it is the better of the two.[157] The port of Rangoon is the only one, therefore, of any consideration.