The physical resources of this region are of such a nature and variety as to make Mackinaw city the entrepot of a vast commerce. This will appear, if we consider that it is the nearest point of that extensive district, including the entire north of the lakes inaccessible to Chicago. When all the lines of internal communication are completed, and the different points on the lakes settled down upon, then the real limits of Mackinaw will drain a geographical surface of three hundred thousand square miles; deducting the surface of the lakes from which, there will remain two hundred and eighty thousand square miles of country, with all the resources of agriculture and mining in the most extraordinary degree. It will be nearly three-fold that which can be drained by Chicago, and in point of territory, whether of quantity or quality, Mackinaw is vastly superior, as a commercial point. With the exception of a small portion of the mineral region, the agricultural advantages of Michigan, Upper Wisconsin, Minnesota, Canada West, and the Superior country, are at least equal, at the present time, to the district shipping at Chicago, while it is more extensive, and will have a large home market in a country affording diversity of employment. Nothing can be more obvious, than the superior advantages of Mackinaw, as a manufacturing point, over any other on the lake coast. The value of exports and imports which flow through the Straits of Mackinaw and the Saut St. Mary was estimated a year or two since at over _one hundred millions of dollars_. But, who can estimate a commerce which every year increases in many fold? In 1856, there were sent through the St. Mary Canal 11,000 tons of raw iron, 1,040 tons of blooms, and 10,452,000 lbs. of copper; and the commercial value of what passed through the canal amounted to upward $5,000,000. But perhaps the most correct idea of the rapid increase of commerce in Lake Superior may be taken from the arrivals at Superior City for the last three years, taken from the Superior Chronicle of January, 1857. In 1854 there were two steamboats and five sail vessels. In 1855 there were twenty-three steamers, and ten sail vessels; and in 1856 forty steamers and sixteen sail vessels. We thus see that in three years the increase was seven-fold. It is scarcely possible to imagine the limits of northwestern commerce on the lake, when a few years shall have filled up with inhabitants the surrounding territories. According to the testimony of Senator Hatch, made on the floor of Congress on the 25th of February, 1859, there were over one thousand six hundred vessels navigating the northwestern lakes, of which the aggregate burden was over four hundred thousand tons. They were manned by over thirteen thousand seamen, navigating over five thousand miles of lake and river coast, and transporting over six hundred millions of exports and imports, being greater than the exports and imports of the United States.