CHAPTER II.
ROMAN REMAINS IN BRITAIN.
Two Varieties of Masonry—Dover Castle—Richborough Castle—Newport Gate, Lincoln—Hadrian's Wall—Its Direction and Construction—Outworks—Ornamental Detail—Roman Roads and Camps.
The remains of Roman architecture in Britain, though numerous, do not exhibit any perfect buildings, and the workmanship in general is not equal to that of the Continental remains. The buildings seem to have been inferior and of smaller dimensions, and there is very little of ornamental detail to be found, except the tesselated pavements, of which many fine examples yet remain in the Roman villas which have been discovered from time to time in various parts of the kingdom.
The principal places where Roman remains are now to be seen are Lincoln, Dover Castle, St. Albans, Richborough Castle, Porchester, York, Cirencester, Leicester, and Colchester. But in all these there is little ornamentation or detail left, the remains consisting chiefly of plain walls, the masonry of which has peculiarities of character which mark its date. Of the masonry there are two principal varieties; the first, and that which is most readily recognised, consists of alternate layers or bands of pebbles, or small stones embedded in mortar, and tiles or flat stones. These bands consisted of three or four courses of tiles or stones laid through the wall, and were placed at two or three feet from each other, the intermediate spaces being raised with a sort of cement composed of mortar and pebbles, or sometimes rag-stones, or such materials as the country afforded. In this manner are built the Mint wall at Lincoln, the Jewry wall at Leicester, and the walls at Verulam (St. Albans), Porchester, Richborough, York, Pevensey, Chesterford, Colchester, Wroxeter, and Silchester.
The other variety consists of walls formed of square stones or ashlar, as the Roman wall in Northumberland. These are sometimes very large, as in the north gate (or Newport gate), Lincoln. Smaller kinds of ashlar, of almost cubical blocks, occur in the multangular tower and other buildings at York. The mortar used in all these walls is in general mixed with pounded brick.
It will not be necessary here to go into a description of all these buildings, but a few of the most remarkable may be mentioned; one of the most curious and interesting of these is the Pharos in the Castle of Dover, though it has undergone much alteration, particularly in the fifteenth century. "Wherever the outer casing is worn away, or has been removed by violence, the walls exhibit the usual mode of Roman building with the material of the districts; in this case with tufa or stalactite, brought perhaps from the opposite coast of France, and flint, with layers of large flat Roman bricks, some of them two feet long, each layer two courses deep, placed regularly and horizontally in the walls at equal intervals, or nearly so. No less than eight of these layers of brickwork are visible on the south-east side; other layers are apparently concealed by the external and subsequent casing of flint and stone, and where the casing of flint is perfect, quoins of stone appear at the angles. This tower is externally octagonal in form; internally the space enclosed forms a square. The doorway, recently blocked, is on the south side, and the arch, turned and faced with a single row of large Roman bricks, springs from a kind of rude impost moulding, somewhat resembling that of the Roman gateway at Lincoln; but this is not now visible. In the interior, the constructive features of the original Roman work were, before the entrance was closed up, far more visible and perfect than on the exterior, and the facing of the bricks was quite smooth; yet the effect of the alterations is here also plainly apparent, and the original windows, the arches of which are turned with Roman brick, have been filled up with flint masonry. Both the external as well as the internal facings of the entrance doorway on the south side were, a few years back, when the interior could be readily examined, far from perfect. Over this doorway were two windows, one above the other, each arched with brickwork. On the east side of the tower is a rather lofty arch faced with stone, the soffit of which, however, appears to have been turned with brick; this probably communicated with some building adjoining. Over this arch is a window now blocked up."
Richborough Castle, in Kent, is another of the most important of the Roman remains in England. It is a large parallelogram, including within it an area of five acres. The walls to the height of six feet are more than eleven feet thick, and above that ten feet eight inches; and the masonry is thus described by the Rev. C. H. Hartshorne:—"At Richborough, commencing at the ground, there are on the north side, where the masonry is displayed in its most perfect state, first of all, four courses of flint in their natural form, then three courses dressed; to these succeed two courses of binding tile, and then they rise above each other in the following order: seven courses of ashlar and two of tile; seven courses of ashlar and two of tile; seven courses of ashlar and two of tile; again, seven courses of ashlar and two of tile; eight courses of ashlar and two of tile; nine courses of ashlar. The extreme height of this wall is twenty-three feet two inches, and its thickness ten feet eight inches."