The Norman East End.—The original form of the Norman east end has long been the subject of discussion and conjecture. It was practically safe to assume that the choir ended in an apse, though whether the aisles were also apsidal, or continued round a great apse as an ambulatory, was a debatable point. This question has now been finally settled.
During some operations necessitating the opening of the floor, in January 1895, certain indications were found which led the diocesan architect, Mr C.H. Fowler, and Canon Greenwell to continue the excavation. The result was the discovery that Carileph's church certainly possessed three apses—a large one terminating the choir, and smaller ones the aisles. The apses of the aisles were square externally, and apsidal internally. The great apse consisted of five bays, one on either side next to the choir, forming an oblong between the choir and the springing line of the curve of the apse, over which would be the great sanctuary arch. The remainder, or apse proper, was divided into three bays by engaged clustered shafts, similar to those of the choir and nave. It was surrounded by a wall arcade of the same character as that of the rest of the church. The base of one of the shafts of the arcade was found in position. An extremely interesting point in this discovery is the fact that the levels are the same as those of the nave and choir. The foundations are on the rock at the same depth, and the aisle walls and apse walls are in the same line. The external square line of the aisle apses is in line with the springing of the choir apse. The foundations of the apse to the north aisle have been thoroughly excavated, and there is every reason to believe that that on the south side of the church entirely corresponds. The width of the north aisle apse from north to south is nine feet eight inches. There can be little doubt, judging from the remainder of Carileph's work, that all three apses were covered with stone vaults, though of precisely what character can only be a matter of conjecture. The cracking, previously spoken of, which led to this part of the church being taken down and the new eastern transept being erected, cannot have arisen from any subsidence of the foundations. It, in all probability, was the result of the thrust of the apse vaults on to walls which were insufficiently buttressed. The marks on some of the stones found during this excavation, and the shape of others, seem to point to the conclusion that here we have the earliest part of the church, and that Carileph used up in his foundations much of the stone of Aldhun's White Church.
Of the two usual eastern endings to Norman churches—viz. those with three apses, and those having the aisle carried round as an ambulatory—the latter is far more common in England, and the former on the Continent. There are two other notable instances of the three apsidal arrangement in England: S. Albans, 1077, which is earlier than Durham; and Peterboro', 1117, which is later than, and was probably modelled on, Durham. There are many examples of ambulatories—the White Tower Church (London), Winchester, Gloucester, Worcester, and Norwich being among them.
The apses of Durham are of considerable depth from east to west, the oblong bay previously mentioned, which is fourteen feet wide in that direction, adding greatly to this effect. The width of the foundations is fourteen feet, and the width of the wall has been seven feet. The diameter of the choir apse from north to south was about thirty-two feet.
These discoveries are specially interesting, completing as they do the whole chain, and leading us with very little imagination to see in its original condition what must have been, and may even now claim to be, the most noble example of Norman architecture in our country.