The awakening of the lands behind Lake Erie, Lake Huron, and Lake Michigan brought forth innumerable demands for roads, canals, and railways to the ports of Buffalo, Cleveland, Toledo, Detroit, Milwaukee, and Chicago. There were actually hundreds of these enterprises undertaken. The development of the land behind Lake Superior was particularly spectacular and important, not only because of its general effect on the industrial world but also because out of it came the St. Mary's River Ship Canal. Nowhere in the zone of the Great Lakes has any region produced such unexpected changes in American industrial and commercial life as did the region of Michigan, Wisconsin, and Minnesota contributory to Lake Superior. If, as the story goes, Benjamin Franklin said, when he drew at Paris the international boundary line through Lake Superior, that this was his greatest service to America, he did not exaggerate. The line running north of Isle Royale and thence to the Lake of the Woods gave the United States the lion's share of that great inland seaboard and the inestimably rich deposits of copper and iron that have revolutionized American industry.
From earliest days rumors of deposits of bright copper in the land behind Lake Superior had been reported by Indians to fur traders who in turn had passed the story on to fur company agents and thus to the outside world. As a result of her "Toledo War"--as her boundary dispute was called--Michigan had reluctantly accepted the northern peninsula lying between Lake Superior and Lake Michigan in lieu of the strip of Ohio territory which she believed to be hers. If Michigan felt that she had lost by this compromise, her state geologist, Douglass Houghton, soon found a splendid jewel in the toad's head of defeat, for the report of his survey of 1840 confirmed the story of the existence of large copper deposits, and the first rush to El Dorado followed. Amid the usual chaos, conflict, and failure incident to such stampedes, order and system at last triumphed and the richest copper mines of the New World were uncovered. Then came the unexpected finding of the mammoth iron-ore beds by William A. Burt, inventor of the solar compass. The circumstance of this discovery is of such national importance that a contemporary description by a member of Burt's party which was surveying a line near Marquette, Michigan, is worth quoting: