In regard to the military importance of the command of the Great Lakes, history ought to teach us a lesson. At the breaking out of the War of 1812, this matter had been entirely neglected by our Government, in spite of the earnest appeals of the officer in command in this quarter. The consequence was the utter failure of the campaign against Canada, and the capture of the principal posts in the Northwest by the British, who had provided a naval force here, small, indeed, but sufficient where there was no opponent. It was not until the naval force organized by Commodore Perry swept the British from Lake Erie that General Harrison was able to recover the lost territory. From these considerations, the importance of strong fortifications in the Straits of Mackinac, to command the entrance of our Mediterranean, would seem to be evident. The early advocates in Congress of these lake-improvements had to encounter a very violent opposition from various quarters. First, the abstractionists of the Virginia school--men who "would cavil for the ninth part of a hair"--affirmed in general terms, that this Government was established with the view of regulating our external affairs, leaving all internal matters to be regulated by the States; and then, descending to particulars, declared, that, while Congress had the power to make improvements on salt water, it could do nothing on fresh. Furthermore, they argued, that, to give the power of spending money, the water must ebb and flow, and that the improvement must be below a port of entry, and not above. Another refinement of the Richmond sophists was this:--If a river be already navigable, Congress has the power to improve it, because it can "regulate" commerce; but if a sand-bar at its mouth prevents vessels from passing in or out, Congress cannot interfere, because that would be "creating," and not "regulating." Other Southern orators and their Northern followers denounced these appropriations as a system of plunder and an attack upon Southern rights, forgetting the fact, that, in these harbor and coast appropriations, the South, with a much smaller commerce than the North, had always claimed the larger share of expenditure. Thus, from 1825 to 1831, New England received $ 327,563.21 The Middle States, including the Lakes, 982,145.20 The South and Southwest 2,233,813.18