From Glenwelt I walked about half a mile to view some of the remnants of the famous Roman wall, a piece above five feet high and several yards long; the facing is of regularly cut freestone but I measured none of them above thirteen inches long and seven broad; the mortar in the facing is quite gone, but much of it remains in the middle, the filling up; very little of it is of that hard nature often found in ancient buildings, but crumbles with ease between the fingers. The stones of the facing are cut very regularly, and well laid; the workmanship undoubtedly very good. Not far from this wall the remains of an earth entrenchment, thrown up for the same purpose, are seen in a parallel line with it. LANCASTER (Ibid., Letter XVIII, p. 196) Lancaster is a flourishing town, well situated for trade, of which it carries on a pretty brisk one; possessing about 100 sail of ships, some of them good burthen, for the African and American trades. The only manufactory in the town is that of cabinet ware. Here are many cabinet makers who work up the mahogany brought home in their own ships, and re-export it to the West Indies, etc. MARLING (Ibid., Letter XVIII, p. 198) As to manures, marle is the grand one, which is found under all this country (Lancashire) and generally within sixteen or twenty inches of the surface ... it lies in beds, many of them of a vast depth, the bottoms of some pits not being found. It is white, and as soft and soapy as butter. They lay about a hundred two-horse cartloads to an acre, but some farmers less, on to lays[31] and stubble. It lasts a good improvement for twenty years: costs about £4 10s. 0d. an acre. Marle is their principal manure, both white, black, blue, sandy and some small marle. They sometimes find perfect cockle and periwinkle shells nine yards deep in beds of marle. It does best on light soil. MANCHESTER (Ibid., Letter XVIII, pp. 242, _et seq._) The Manchester manufacturers are divided into four branches--the fustian, the check, the hat and the worsted small wares. All sorts of cotton are used but chiefly the West Indian.... Many low priced goods they make for N. America, and many fine ones for the West Indies. The whole business was exceedingly brisk during the (7 Years’) war, and very bad after the peace, but now are pretty good again, though not equal to what they were during the war. All the revolutions of late in the N. American affairs are felt severely in this branch ... the interruptions caused by the convulsions in America very severely felt by every workman. None ever offered for work but they at once had it, except upon the regulations of the Colonies cutting off their trade with the Spaniards, and the Stamp Act. The last advices received from America have had a similar effect, for many hands were paid off in consequence of them ... America takes three-fourths of all the manufacturers of Manchester. NEWCASTLE (Ibid., Letter XV, p. 11. 1770)