Frenchman, of which, at first sight, it seems to be a mere continuation. The triforium also of this Trinity Chapel differs from that of the choir, in that its four pointed arches instead of being, like them, included under two circular ones, are set in the form of an arcade of four arches, of two orders of mouldings each. The mouldings are the same as in the choir, but the effect of their arrangement is richer. Also in the clerestory two windows are placed over each pier-arch, instead of the single window of the choir. The mixture of the two forms of arches is still carried on, for although the semicircular arch is banished from the triforium, it is adopted for the pier-arches. "However, in the side-aisles of the Trinity chapel, and in the corona, our English William appears to have freed himself almost as completely from the shackles of imitation, as was possible. In the side-aisles the mouldings of the ribs still remain the same, but their management in connection with the side walls, and the combination of their slender shafts with those of the twin lancet windows, here for the first time introduced into the building, is very happy. Slender shafts of marble are employed in profusion by William of Sens, and Gervase expressly includes them in his list of characteristic novelties. But here we find them either detached from the piers, or combined with them in such a manner as to give a much greater lightness and elegance of effect than in the work of the previous architect. This lightness of style is carried still farther in the corona, where the slender shafts are carried round the walls, and made principal supports to the pier-arches, over which is placed a light triforium and a clerestory; and it must be remarked that all the arches in this part of the building are of a single order of mouldings, instead of two orders as in the pier-arches and triforium of the choir."