By means of Cheat and Monongahela rivers it has been shewn, that an opening may be obtained to Pittsburgh. This will be a route of about four hundred and fifty miles from Washington, and in it there will be one portage, from the Patowmac to Cheat River, of thirty-seven miles, and perhaps two or three others; but these will be all very small. It has been ascertained beyond doubt, that the Pittsburgh merchant can have his goods conveyed from New York, by means of the Hudson and Mohawk rivers, to Oswego, and from thence by the lakes Ontario and Erie, and the Alleghany River, to Pittsburgh, for one third of the sum which it costs him to transport them by land from Philadelphia. He prefers getting them by land, because the route from New York, is uncertain; his goods may be lost, or damaged, or delayed months beyond the time he expects them. From Hudson River to the Mohawk is a portage of ten miles, or thereabouts; and before they can get to Oswego are two or three more. At Oswego the goods must be shipped on board a vessel suitable for navigating the lakes, where they are exposed to tempests and contrary winds. At the Falls of Niagara is a portage of nine miles more; the goods must here be shipped again on board a vessel on Lake Erie, and after arriving at Presqu’ Isle must be conveyed over another portage preparatory to their being laden in a boat upon the Alleghany River. The whole of this route, from New York to Pittsburgh, is about eight hundred miles; that from the federal city not much more than half the distance; if therefore the merchant at Pittsburgh can get his goods conveyed from New York for one third of what he pays for the carriage of them by land from Philadelphia, he ought not to pay more than one sixth of the sum for their carriage from the federal city; it is to be concluded, therefore, that he will avail himself of the latter route, as there will be no objection to it on account of any uncertainty in the mode of conveyance, arising from storms and contrary winds.