On the north side of the Lady Chapel stands an old square tower, now used as a belfry for the parish of the Holy Trinity, but it is not certain for what purpose it was originally used. Adjoining this is a building recently erected on the site of a former one, comprising a practice-room and school-room for the Choristers, with a residence for the master; beyond this, eastward, is an arched gateway communicating with the public street: this was closed up for many years, but has lately been re-opened; over it is the muniment room of the Dean and Chapter. Next is a residence for one of the Vergers, and beyond that is another dwelling house; the next portion is in a dilapidated state, and at the present time is used as a mason's yard and workshop for carrying on the works in progress: these occupy the site of the ancient +Sacristy+. A little further in the same direction stands the residence of one of the prebendaries, on the site of the ancient +Almonry+; there are in this building some remains of Early English vaulting, and at the east end may be observed the remains of a triplet window of the same period; the middle window has been destroyed by the insertion of a modern window, now blocked up, but the stone work of the side windows can easily be traced. We next proceed round the east end of the Cathedral to the south end of the Transept, a few yards south of which may be observed a range of Early English arches, each containing a double arch, which is again subdivided, but all have been long blocked up; this was a portion of what was called the "Dark Cloister." To the eastward of these is another range of arches with piers about twelve feet in height, some of which are comparatively perfect; these piers are alternately cylindrical and octagonal, the octagonal columns presenting alternately a side or an angle in front. The arches are profusely enriched with mouldings; the walls above were pierced with a row of small windows with semicircular heads. These piers and arches may be seen on both sides of the road-way, corresponding with each other like the nave of a church, and afford a good example of "highly refined Norman work." A beautiful arch at the end leads to another series, and beyond this, in one of the prebendal houses, is a vaulted room which seems to have been erected about the period of the transition from the Norman style to the Early English.