It thus comprises some twenty-three degrees of longitude in length, and from three to ten degrees of latitude in breadth, being about 2,100 miles in its greatest length.

In some places it is arable.

Some idea may be formed of the terror with which this 'Sea of Sand,' with its vast billows of shifting sands, is regarded, from the legend that in one of the storms 360 cities were all buried within the space of twenty-four hours." So also Gilmour's "Among the Mongols," chap.

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