The Liao plain, thirty miles wide, and the central Sungari plain, are the largest in Manchuria, forming together a long narrow valley floor between two parallel mountain systems and extending northeasterly from the Liao gulf, between Port Arthur and Shanhaikwan, up the Liao river and down the Sungari to the Amur, a distance of eight hundred or more miles. These plains have a fertile, deep soil and it is on them and other lesser river bottoms that Manchurian agriculture is developed, supporting eight or nine million people on a cultivated, acreage possibly not greater than 25,000 square miles. Manchuria has great forest and grazing possibilities awaiting future development, as well as much mineral wealth. The population of Tsitsihar, in the latitude of middle North Dakota, swells from thirty thousand to seventy thousand during September and October, when the Mongols bring in their cattle to market. In the middle province, at the head of steam navigation on the Sungari, because of the abundance and cheapness of lumber, Kirin has become a shipbuilding center for Chinese junks. The Sungari-Milky-river, is a large stream carrying more water at flood season than the Amur above its mouth, the latter being navigable 450 miles for steamers drawing twelve feet of water, and 1500 miles for those drawing four feet, so that during the summer season the middle and northern provinces have natural inland waterways, but the outlet to the sea is far to the north and closed by ice six months of the year. Not far beyond the Great Wall of China, fast falling into ruin, partly through the appropriation of its material for building purposes now that it has outlived its usefulness, another broad, nearly dry stream bed was crossed. There, in full bloom, was what appeared to be the wild white rose seen earlier, further south, west of Suchow, having a remarkable profusion of small white bloom in clusters resembling the Rambler rose. One of these bushes growing wild there on the bank of the canal had over spread a clump of trees one of which was thirty feet in height, enveloping it in a mantle of bloom, as seen in the upper section of Fig. 204. The lower section of the illustration is a closer view showing the clusters. The stem of this rose, three feet above the ground, measured 14.5 inches in circumference. If it would thrive in this country nothing could be better for parks and pleasure drives. Later on our journey we saw it many times in bloom along the railway between Mukden and Antung, but nowhere attaining so large growth. The blossoms are scant three-fourths inch in diameter, usually in compact clusters of three to eleven, sometimes in twos and occasionally standing singly. The leaves are five-foliate, sometimes trifoliate; leaflets broadly lanceolate, accuminate and finely serrate; thorns minute, recurrent and few, only on the smaller branches.