The rivers which join the Ouse on the north-eastern aide are far as numerous and important than those on the south-west. The inton, which joins it near Newton-upon-Ouse, and which is the first any consequence below the junction of the Ure and the Swale, sea on the Howardian Hills, a little north of Ensingwold, and flows south-west to near Alne, where it receives another small stream from the south of Easingwold, and one on the opposite side from the lower ground of the Vale of York. Its principal tributary rises a few miles north of York, near the river Foss, and runs first north and then west through the tract called Galtres Forests The Foss rises near Nevrbergh Hall, about 4 miles N. from Easing weld, then crosses Oulatone Moor, where is a reservoir for supplying the navigation in dry seasons, and passing towards the south-east, reaches Sheriff Hutton Bridge, from which point it has been made navigable by the aid of a cut of about 2 miles, to avoid a considerable bend, for a distance of 12i miles, with a fall of 47 feot 8 inches to the level of the Ouse in its ordinary summer state. The lower part of its course is to the south, with a slight inclination westward, and after passing through the eastern quarter of the city of York, it falls into the Ouse on the south side of the castle.
The Dement, which Is the only important stream descending from the highlands on the eastern aide of the county, rises near the Flask Inn, about 3 miles S.W. from Robin Hood's Bay, iu the Eastern Moor land& From this point it runs nearly parallel with the coast in a southern direction, with a very tortuous course, to the Vale of Picker ing, receiving several tributaries from the west, from Harwood-Dale, Long-Dale, Deep-Dale, and Trout's-Dale. Near Canton it is joined by the Hertford or Hartford, which rises very near the coast at Filey Point, and the Derwent then runs westward along the valley which separates the Eastern Moorlands from the Yorkshire Welds, to Yeding ham Bridge, below which it is navigable for barges, and its course becomes south-west, and at length nearly due south. Below Yed ingham or Yeddiugham, the Derwent is greatly augmented by the waters of the Rye. From the junction of the Rye, which gives name to the wapentake of Ryedale, the Derwent flows by New Melton through a beautifully diversified district, past the ruins of Kirkham Abbey, by Stamford Bridge, to East Cottingwith, where it receives the Pocklington Canal from the north-east, by Bubwith and Wrestle, to its junction with the Ouse at Barnby, about 7 miles below Selby. The navigation is the property of Earl Fitzwilliam, and extended originally to New Melton, about 38 miles. The additional length of nearly Ile miles to Yediogham Bridge was made navigable in 1805. The Hull rises at the eastern foot of the in the East Riding, about 3 miles W. by N. from Great Driffield, and flows south-east to near Frodingbam, where it receives the Old How Draio, which rises near the sea-coast, a little north of Horwee. From the junction the Hull runs southward to the Humber at Kingston-upon-Hull, to which town it gives the name by which it is most familiarly known. The Hull is navigable from the junction of its two principal feeders, the upper part of the navigation being effected by an artificial channel, and it communicates with the Driffield, Leven, and Beverley oanals.
This river drains the greater part of the country which is cut off from the valley of the Ouse by the Weida: but the northern portion of that district drains into a small stream which rises near Wharram-le-Street, and follows the course of the northern range of the partly by a subterranean channel, to the sea near Bridlington; and a part of the southern extremity of Holdernese drains into an independent stream which flows by Hedon into the Humber.
The Esk, with its numerous tributaries, drains the northern portion of the Eastern Moorland& It rises about 20 miles in a straight line west from Whitby, and, collecting the streams from several dales which run at right angles or nearly so to its course, flows eastward through the narrow but beautiful valley of Eakdale to the sea at Whitby.
The Tome rises in the neighbourhood of Tickhill, near the south east boundary of the county, and flows in a very irregular course to the north-east, being separated from the valley of the Don by the intervention of some comparatively high ground. After meandering through the low levels iu the vicinity of Hatfield Chace it joina the county boundary near the Stainforth and Keadby Canal, and for the remainder of its course to the Trent, which it joins just before its confluence with the Ouse, this stream forms the boundary between Yorkshire and Liucolnshire.
The Ribble rises in the north-western extremity of the West Riding, and flows first to the west past Cam Hill, and then to the south by Horton, Settle, and near Long Preston and Gisburn, to the county boundary at Grindlaton. It turns towards the south-west above Gisburn, and continues in that direction along the border of the county for a few miles, past until the boundary turns north ward, while the Ribble pursues its former direction through Lan cashire. [LANCARIIIRE.] The Tees joins the county bonudary at its north-western extremity, at the junction of Yorkshire, Westmorland, and Durham, in the Lune Forest, and it continues to form the boundary between Yorkshire and Durham for the whole of Its course from that point to the Bea. This river being fully described under DUREIAM, it is sufficient here to notice its principal tributaries on the Yorkshire side, which are as follows:— The Lune, which rises near the border of Westmorland, and flows north-east through Lune Forest to the Tees, a little below Middleton. The Bander, which flows lu the same direction, and enters the Tees about midway between the junction of the Lune and Barnard Castle, pea-sing iu its course those hills in Staiumoor Forest which, in common with the heights near Robin Hood's Bay, bear the name of Robin Hood's Butts. The Greta River or Beck, sometimes called the Barney, the longest branch of which rises in Westmorland, but which, though very winding, pursues the same general course towards the north-east, the river being the centre of the beautiful scenery about Greta Bridge to the Tees : the junction of the two rivers forms a remarkably pic turesque scene. The Leaven, which collects the waters of numerous rivulets from the north-western escarpment of tho Eastern Moorlands, and of the Tame from the Vale of Cleveland, and, flowing westward by Stokesley to Rudby, thence turns north by a winding course to the Tees below Yarm.