The Southern element constituted the main portion of this phalanx of ax-bearers. Abraham Lincoln's father joined the throng of Kentuckians that entered the Indiana woods in 1816, and the boy, when he had learned to hew out a forest home, betook himself, in 1830, to Sangamon county, Illinois. He represents the pioneer of the period; but his ax sank deeper than other men's, and the plaster cast of his great sinewy hand, at Washington, embodies the training of these frontier railsplitters, in the days when Fort Dearborn, on the site of Chicago, was but a military outpost in a desolate country. While the hard woods of Illinois were being entered, the pioneer movement passed also into the Missouri Valley. The French lead miners had already opened the southeastern section, and Southern mountaineers had pushed up the Missouri; but now the planters from the Ohio Valley and the upper Tennessee followed, seeking the alluvial soils for slave labor. Moving across the southern border of free Illinois, they had awakened regrets in that State at the loss of so large a body of settlers. Looking at the Middle West, as a whole, in the decade from 1810 to 1820, we perceive that settlement extended from the shores of Lake Erie in an arc, following the banks of the Ohio till it joined the Mississippi, and thence along that river and up the Missouri well into the center of the State. The next decade was marked by the increased use of the steamboat; pioneers pressed farther up the streams, etching out the hard wood forests well up to the prairie lands, and forming additional tracts of settlement in the region tributary to Detroit and in the southeastern part of Michigan. In the area of the Galena lead mines of northwestern Illinois, southwestern Wisconsin, and northeastern Iowa, Southerners had already begun operations; and if we except Ohio and Michigan, the dominant element in all this overflow of settlement into the Middle West was Southern, particularly from Kentucky, Virginia, and North Carolina. The settlements were still dependent on the rivers for transportation, and the areas between the rivers were but lightly occupied. The Mississippi constituted the principal outlet for the products of the Middle West; Pittsburgh furnished most of the supplies for the region, but New Orleans received its crops. The Old National road was built piecemeal, and too late, as a whole, to make a great artery of trade throughout the Middle West, in this early period; but it marked the northern borders of the Southern stream of population, running, as this did, through Columbus, Indianapolis, and Vandalia.