By attending to these distinctions with map in hand we shall gain some adequate idea of the surface of our continent. The first and second of the regions we have left behind us, and at Leavenworth are well out upon the third. It would not be just to call it prairie,--and it is equally distinct from the true Plains. As a grain and grass land, Illinois nowhere rivals it; but its surface is remarkably different from that of the prairies east of the Mississippi. It may be described as an alternation of lofty bluffs and sinuous ravines,--the former known as "divides," the latter as "draws." The top of these divides preserves one general level,--leading naturally to the hypothesis that all the draws are valleys of erosion in a tract of alluvial deposit originally uniform with the plateaus of the divides. Some of the larger draws still serve as the channels of unfailing streams; most of them carry more or less water during the rainy season; few of them are dry all the year round. The river-bottoms which traverse this region are thickly fringed with cotton-wood and elm timber; but it is a rare thing to encounter trees on the top of a divide. The fertility of the soil is boundless. Every species of grass flourishes or may flourish here, with a luxuriance unrivalled on the continent. Of the tract embraced between the Little Blue and the Republican Fork of the Kaw this is especially true. The climate is so mild and uniform that cattle may be kept at pasture the whole year round. Haymaking and the building of barns are works of supererogation. The wild grass cures spontaneously on the ground. To provide shelter against exceptional cases of climatic rigor,--an unusual "cold snap," or a fall of snow which lies more than a day or two,--the _ranchero_ constructs for his cattle a simple corral, or, at most, a rude shed. The utmost complication which can occur in his business is a stampede; and few of our Eastern farmers' boys would hesitate to exchange their scythes, hay-cutters, corn-shellers, and mash-tubs for the saddle of his spirited Indian pony and his three days' hunt after estrays. Over this entire region the cereals thrive splendidly. The wild plum is so abundant and delicious as to suggest the most favorable adaptation to the other stone-fruits. Every vegetable that has been tried in the loam of the river-bottoms succeeds perfectly. There is just reason to think that vine-culture might reach a development along the southern slope of the Republican Bluffs not surpassed in the most favorable positions east of California. We believe it no exaggeration to say that this region needs only culture (and that of the easiest kind) to become the garden of the continent. Its mineral wealth has received scanty examination; yet we know that it contains numerous beds of tertiary coal, and easily worked iron-deposits, in the form both of hydrated oxide and black scale.