. . .to the choir, but still further width is added by the fact that the ambulatory is double. The first triforium that goes around above us is not pierced, but just [Pg 65]above it we find the spacious embrasures of the second triforium. These latter are the largest of their kind the writer has ever seen; in fact, they are large enough to be placed in the clerestory of most cathedrals. Not satisfied with these, the architect has still further increased the lighting of the choir and given greater scope for the glazier by placing above this second triforium the lofty windows of the true clerestory, those toward the west of six lancets each, and those toward the east of two. All the panels of this great curtain of light are glazed in the mosaic style, but the pieces of glass used are noticeably larger than we have been accustomed to find in the medallion treatment. As a result, the amount of leading is reduced and a great deal more colour meets our eye, colour whose individual t. . .