#North Transept.#--The walls of the north transept are lower than those of the nave, and its roof, covered with a particularly ugly coating of zinc, is much more highly pitched. Thus the ridges of the two roofs are practically level, while the battlement of the transept is only on a level with the point at which the arches of the clerestory in the nave spring. The union of the two and the contrast between the low-pitched roof of the nave and the stilted roofs of the transept are rather awkward. It should be said that the zinc roof of the north transept was a necessity, as the old roof of stone tiles proved to be too heavy. But for these inevitable differences the exterior of the north transept blends most successfully with that of the nave, though, of course, its details are altogether different. As an example of the great effect to be attained by the lancet windows, delicate proportions, and restrained ornament of the Early English style, it has never been surpassed. It extends three bays from the nave. The aisle buttresses end some little way below the battlements of the aisle. There are no buttresses against the main wall of the transept; but it is ornamented with a row of arches, some blank, and some pierced with the clerestory windows. These windows are in groups of three separated by two blank arches. The blank arches are wider than the windows. All the arches are decorated with dog-tooth mouldings. The absence of buttresses and the continuous row of arches cause a remarkable freedom from vertical lines in the exterior of the transepts, which is also characteristic of the interior. The battlements, both of the aisles and of the transept itself, are quite plain. The most admirable portion of this transept is its north front, which contains the famous group of lancet windows known as the "five sisters." These are five very narrow and long windows separated only by slender shafts. Below them is a blind arcade almost entirely without ornament, and above them another group of five lancet windows of different sizes, gradually diminishing from the central window to follow the outline of the gable. The details of these upper windows closely resemble those of the "five sisters," and they are flanked by two blind arches. The buttresses are also ornamented with blind arches, and appear never to have been finished, as they are truncated in an unusual way where one would expect pinnacles. The exterior of the western aisle of this transept is very curious in arrangement. There is an almost complete absence of division into bays. There are two lancet windows to each bay, and buttresses rise between them as well as between the bays. Thus there is nothing to mark the interior division of the main arches, clerestory, and triforium. All of these buttresses are cut short by caps a little way below the tops of the windows. Between the groups of aisle windows are blind arches narrower than the windows themselves. There is