and was not much easier to penetrate than when La Salle and Hennepin found their way to the Mississippi more than a century before.
A great exception broke this rule. Two wagon-roads crossed the Alleghany Mountains in Pennsylvania,—one leading from Philadelphia to Pittsburgh; one from the Potomac to the Monongahela River; while a third passed through Virginia southwestward to the Holston River and Knoxville in Tennessee, with a branch through the Cumberland Gap into Kentucky. By these roads and by trails less passable from North and South Carolina, or by water-ways from the lakes, between four and five hundred thousand persons had invaded the country beyond the Alleghanies. At Pittsburgh and on the Monongahela existed a society, already old, numbering seventy or eighty thousand persons, while on the Ohio River the settlements had grown to an importance which threatened to force a difficult problem on the union of the older States. One hundred and eighty thousand whites, with forty thousand negro slaves, made Kentucky the largest community west of the mountains; and about ninety thousand whites and fourteen thousand slaves were scattered over Tennessee. In the territory north of the Ohio less progress had been made. A New England colony existed at Marietta; some fifteen thousand people were gathered at Cincinnati; half-way between the two, a small town had grown up at Chillicothe, and other villages or straggling cabins were to be found elsewhere; but
