Before the Chain Gate was made, the vestibule ended with a graceful window of four lights similar to those at the side. The upper part of the window remains, but the lower part is occupied by a Perpendicular doorway, and the whole now forms a screen which, by breaking the light, adds considerably to the charm of the staircase. Through this doorway, where they are cut away to allow the door to open, the steps continue for two stages, but in a narrower flight. Here the windows are Perpendicular, and the vaulted ceiling has given place to a wooden roof, for this is the Chain Gate, as light and pretty within as without. It was only an after-thought, a matter of convenience, thus to connect the chapter-house with the Vicars' Close, and the screen that now breaks the light had for a century and a half been the outside window, just as the blocked window of the transept had been the outer light for the fifty years before the staircase itself was thought of. It was just a practical matter-of-fact device; but what magnificent utilitarianism, what an inspired after-thought! [Illustration: Steps Of Chapter-house Vestibule And Passage Over Chain Gate.] The main gallery of the Chain Gate is shut off by a door which, if it were kept open, would make the prospect even more beautiful than it is. Two corbels which support the vaulting-shafts of the lower staircase should be noticed; they both represent figures thrusting their staves into the mouth of a dragon, but that on the east (wearing a hood and a leathern girdle round his surcoat) is as vigorous in action as the figure on the west side is feeble. A small barred opening in the top of the east wall lights a curious little chamber, which is reached from the staircase that leads to the roof. THE CHAPTER-HOUSE is entered by a double-arched doorway, the small vault between the arches having an odd boss composed of four bearded heads. There are marks in the wall which lead one to think that the doors were hung in a wooden screen under this vault. The old doors are now used in the house of the Principal of the College, where they were identified by Canon Church. They have little slits in them, through which those in the chapter-house could speak with those without, who no doubt waited for admittance on the stepped stone bench of the staircase. Grooves in the two inner shafts of the doorway seem to have been made for the insertion of some light screen, by which the entrance was divided into two passages for ingress and egress. The absence of doors certainly adds to the rather cold unfurnished appearance of the chapter-house in its present condition. [Illustration: Chapter-House--Doorway.]