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38 gineers. But many rivers blocked the way; the first of these from Vincennes was the Embarras—so called, as in the case of many streams, because the great floods left deposits of driftwood which seriously impeded navigation. West of the Embarras came the petulant Little Wabash and the Big Muddy, draining thousands of square miles of swamp and prairie, and, in rainy seasons, uniting and spreading out five miles in width. West of the tributaries of the Little Wabash come those of the Kaskaskia. A few smaller Wabash and Mississippi tributaries, such as the Bonpas and St. Mary are headed by this trans-Illinois route, but it was not, in one sense, a watershed route, crossing the Embarras, Little Wabash, Fox, Beaucoup, and Kaskaskia and their tributaries.

These streams flow southward. Kaskaskia lay some fifty miles south of St. Louis and the later St. Louis Trace. The route of the more ancient Kaskaskia Trace to Vincennes, therefore, ran some seventy-five miles in a northeast direction; then, turning due east, it ran about one hundred miles to the Wabash. For the first seventy-five