Seven miles above Milford the Delaware River makes the great right-angled bend in its course, from the southeast to the southwest, which is known as the "Tri-States Corner," and here, on the broad flats at the mouth of the Neversink River, is the town of Port Jervis. From the village of Deposit, ninety miles above, the Delaware descends in level five hundred and seventy feet; and from Port Jervis down to the Water Gap, forty-three miles, the descent is one hundred and twenty-seven feet. In the first it falls six feet per mile and in the latter only three feet, the difference being caused by the entirely changed conditions above and below the great bend. Above, the Delaware flows through the ridges by a winding ravine cut transversely across the hard rocks almost all the way, while below, it meanders parallel to the ridges along the outcrop of the softer rocks of the Marcellus shales and Clinton formations in the long, trough-like buried valleys. The Neversink comes from the northeast through one of these valleys which is prolonged over to the Hudson, the source of the Neversink being on a divide of such gentle slope that the large spring making the head sends part of its waters the other way, through Rondout Creek into the Hudson. A long, narrow peninsula, just at the completion of the great bend, juts out between the Neversink and the Delaware, ending in a sharp, low, wedge-like rocky point, the extremity being the "Tri-States Corner," where the boundary line between New Jersey and New York reaches the Delaware, and ends in mid-river at the boundary of Pennsylvania. This spot was located after a long boundary war, and the fact is duly recorded on the "Tri-States Rock," down at the end of the point. The Delaware and Hudson Canal, constructed in 1828, and coming over from Rondout Creek through the Neversink Valley, made Port Jervis, which was named after one of its engineers. The canal goes up the Delaware to the Lackawaxen, and then follows that stream to Honesdale. The Erie Railway also comes through a gap in the Kittatinny (here called the Shawangunk Mountain, meaning the "white rocks"), descends to Port Jervis, and then follows up the Delaware. These two great public works have made the prosperity of the town, which has a population of over ten thousand. The long and towering ridge of Point Peter, forming the northwestern boundary of the Neversink Valley, and thrust out to the Delaware, bounding the gorge through which the river comes, overlooks the town. On the other side is the highest elevation of the Kittatinny and the most elevated land in New Jersey, High Point, rising nineteen hundred and sixty feet. THE CATSKILL FLAGS.