The stone-work of all the window traceries was very carefully cramped together with strong toothed iron plugs let into the centre of the stones, and the masons seem, in many cases, to have marked the beds and not the face of the stones. Indeed, the early masons’ marks are but few in number, and most of those that I saw occurred at the base of the eastern walls, and again in the upper portion of the work. On the late, and thoroughly Spanish chapel of Santiago also, a good many occur on the outer face of the stones. Owing to the works which were in progress in the south transept, I had an unusually good opportunity of looking for these marks, not only on the face of the stones, but also on their beds, and their almost entire absence from the early work was very remarkable. On the other hand, there were markings on some of the other stones which were of much more interest. I found, for instance, one of the large stones forming the capital of the pier at the crossing of the nave and transepts, carefully marked, first with an outline of the whole of the jamb mould, then with the lines of the capital, and finally with the whole of the archivolt. It had all the air of being the practical working drawing used for the execution of the work, some little alterations having been made in the archivolt. It is easy to conceive that the architect may thus have designed his details, and his mode bears considerable analogy to that which M. Verdier describes as having been adopted at Limoges, where the lines of the groining and all the working outlines were scratched on the floor of the triforia; here the lines are scratched boldly on the surface of the stones. The walls throughout the church were built of rubble, faced with wrought stone inside and out, and some of the failures in the work are attributable, no doubt, to the want of strength and bond of this kind of walling. The dimensions of the various parts are about as follows:-- Total internal length 300 feet. “ width of nave and aisles 83 feet. Height to springing of main arches 25 feet 6 inches. “ floor of triforium 46 feet. “ centre of groining about 100 feet. These dimensions, though not to be compared to those of many of the French churches, are still very noble, and would place this among the finest of our own buildings in respect of height; but, like all Spanish, and most French churches, the length is not very grand.