Middleton is a long, straggling town, starting away from a stone bridge over the Tees, and climbing far away up the sides of the hills. It is built entirely of stone, even to the roofs and the chimneys. This is a peculiarity of all the houses in Upper Teesdale. Slates, in small quantities, have penetrated thus far into the wilds; but of baked clay, otherwise than in the form of pottery, there is no suggestion until the village of Cotherstone is reached, whence emanates the famous Cotherstone cheese. Below the bridge at Middleton the Tees leaves behind it the stern Yorkshire moorlands and scaurs, the hills on either bank withdrawing themselves that it may glitter in the sunbeams over a pebbly bed. Henceforth, until it approaches the large towns, and when it encounters the sea-tides, it flows, broad and open, past richly-wooded banks. In all England there is no more pleasant valley than that which the Tees waters between Middleton and Pierce Bridge. There is an almost equal beauty in the valleys of its numerous tributaries. "All the little rills concealed among the forked hills" have their individual features of loveliness, and hide sweet secrets of their own. About a mile below Middleton the river Lune ripples sunnily down into the Tees. Rising in Westmorland, it flows across that portion of Yorkshire which interposes itself between Westmorland and Durham, wearing one of the deepest of channels for itself, and giving token of frequent floods in the large stones by which its bed is thickly strewn. The river Lune is a favourite stream for trout, but it is still more renowned as a spawning ground for salmon; for as that kingly fish cannot ascend the Tees beyond the seventy-foot precipice at High Force, and as some of the higher tributaries are polluted with water from the lead mines, the Lune and the Balder, a smaller stream which flows into the Tees at Cotherstone, are almost the only accessible breeding beds. [Illustration: BARNARD CASTLE.]