The water in the Patowmac continues nearly the same depth that it is opposite to the city for one mile higher, where a large rock rises up in the middle of the river, on each side of which there are sand-banks. It is said that there is a deep channel between this rock and the shore, but it is so intricate that it would be dangerous to attempt to take a large vessel through it. The navigation, however, is safe to the little falls for river craft, five miles further on; here a canal, which extends two miles and a half, the length of these falls or rapids, has been cut and perfected, which opens a free passage for boats as far as the great falls, which are seven miles from the others. The descent of the river at these is seventy-six feet in a mile and quarter; but it is intended to make another canal here also; a part of it is already cut, and every exertion is making to have the whole completed with expedition[11]. From hence to Fort Cumberland, one hundred and ninety-one miles above the federal city, there is a free navigation, and boats are continually passing up and down. Beyond this, the passage in the river is obstructed in numerous places; but there is a possibility of opening it, and as soon as the company formed for the purpose have sufficient funds, it will certainly be done. From the place up to which it is asserted the passage of the Patowmac can be opened, the distance across land to Cheat River is only thirty-seven miles. This last river is not at present navigable for more than fifty miles above its mouth; but it can be rendered so for boats, and so far up that there will only be the short portage that I have mentioned between the navigable waters of the two rivers. Things are only great or small by comparison, and a portage of thirty-seven miles will be thought a very short one, when found to be the only interruption to an inland navigation of upwards of two thousand seven hundred miles, of which two thousand one hundred and eighty-three are down stream. Cheat River is two hundred yards wide at its mouth, and falls into the Monongahela, which runs on to Pittsburgh, and there receives the Alleghany River, united they form the Ohio, which after a course of one thousand one hundred and eighty-three miles, during which it receives twenty-four other considerable rivers, some of them six hundred yards wide at the mouth, and navigable for hundreds of miles up the country, empties itself into the Mississippi. Footnote 11: For a further description of these Falls see Letter XXXI in Volume II.