Page:Roman Manchester (1900) by Charles Roeder.djvu/21

 : 12 inches rough, undressed sandstone;
 * 19 " consisting of six consecutive layers of well-selected, oval-shaped, small boulder stones, carefully laid in rows, each 2 inches to 3 inches high, all of 5 inches long, and imbedded between regular bands of stiff brown clay, below the natural deposit of
 * 70 " valley gravel, which again rest immediately on the scooped surface of the red rock.

On the western side of the same trench (about 10 feet wide), the layer of 6 inches clay is absent.

In trench No. 2, starting from the bottom, we find:—
 * 10-12 inches boulder stones, of medium to large size, bedded on clay;
 * 10 " stiff brown clay;
 * 7 " large, dressed red sandstone;
 * 8 " mortar.

Rest obliterated by some fireplace, built into the wall at this point, which cuts off the remaining 3 feet.

At duplicate-trench No. I, we have a cross and longitudinal section of the wall 10 feet long, which shows:—
 * 23 inches rubbish;
 * 29 " greenish soil;
 * 4-5 " boulder-stones, bedded in stiff boulder clay. underlaid by
 * 45 " valley gravel.

And about a yard to the east, instead of boulder stones, we meet with rubble or red sandstone, resting on the clay, and below a light yellow soil, which I may call the pre-Roman or original surface, which spreads over the valley gravel.