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 in the valley of the Irawaddy. This large stream, rising in Thibet, flows almost due south some twelve hundred miles, receiving tributaries east and west, and communicating by numerous branches with the Salween, running parallel on the east, but almost useless for travel, owing to its rapids.

The Burmese delta (a network of intercommunicating waters from the Indian border-ranges to the banks of the Salween near the Siamese frontier) has some fourteen outlets, but most of these are obstructed by sandbars and coral-reefs. Bassein and Rangoon are the seagoing ports. The latter is a large city of over one hundred thousand inhabitants, and now ranks third in commercial importance in the Indian empire. This plain from the coast to Prome is subject to periodical inundations and is exceedingly productive. It is a great rice-district. Below the northern frontier of British Burmah the Irawaddy is nearly three miles broad. In the neighborhood of Prome the face of the country changes. Ranges of lofty mountains approach nearer and nearer, and finally close in on the stream, the banks becoming precipitous and the valley narrowing to three-quarters of a mile. Above the latitude of Ava the whole region is intersected by mountains, and not far from Mandalay, the capital of Upper Burmah, is their lowest defile. The banks at this point are cov-*