One very great handicap in lake commerce up to this time had been the lack of harbors. Detroit alone of the lake ports was distinctly favored in this respect. The harbors of Buffalo, Cleveland, Milwaukee, and Chicago were improved slowly, but it was not until the great Chicago convention of 1846 that the nation's attention was focused on the needs of Western rivers and harbors, and there dawned a new era of lighthouses and buoys, breakwaters and piers, and dredged channels. Another handicap to the volume of business which the lake boats handled in the period just previous to the Civil War was the inadequacy of the feeders, the roads, riverways, and canals. The Erie Canal was declared too small almost before the cries of its virulent opponents had died away, and the enlargement of its locks was soon undertaken. The same thing proved true of the Ohio and Illinois canals. The failure of the Welland Canal was similarly a very serious handicap. Although its locks were enlarged in 1841, it was found by 1850 that despite the improvements it could not admit more than about one-third of the grain-carrying boats, while only one in four of the new propellers could enter its locks. As late as the middle forties men did not in the least grasp the commercial situation which now confronted the Northwest nor could they foresee that the land behind the Great Lakes was about to deluge the country with an output of produce and manufactures of which the roads, canals, ships, wharfs, or warehouses in existence could handle not a tenth part. They did not yet understand that this trade was to become national. It was well on in the forties before the Galena lead mines, for instance, were given up as the terminal of the Illinois Central Railroad and the main line was directed to Chicago. The middle of the century was reached before the Lake Shore was considered at Cleveland or Chicago as important commercially as the neighboring portage paths which by the Ordinance of 1787 had been created "common highways forever free." The idea of joining Buffalo, Cleveland, and Chicago with the interior--an idea as old as the Indian trails thither--still dominated men's minds even in the early part of the railroad epoch. Chicago desired to be connected with Cairo, the ice-free port on the Mississippi; and Cleveland was eager to be joined to Columbus and Cincinnati. The enthusiastic railway promoters of Ohio, Indiana, and Illinois drew splendid plans for uniting all parts of those States by railway lines; but the strategic position of the cities on the continental alignment from New York to the Pacific by way of South Pass never came within their horizon. The ten million dollar Illinois scheme did not even contemplate a railway running eastward from Chicago. But the future of the commerce of the Great Lakes depended absolutely upon this development. There was no hope of any canals being able to handle the traffic of the mighty empire which was now awake and fully conscious