The tracery of the two smaller windows is most curious and unusual. The smallest is also of a very odd shape, being almost as narrow as a lancet window, with, however, a rather obtuse arch. It is divided into two lights, which rise without further tracery to about three-quarters of the height of the whole window. Into the upper part are crowded five trefoils of different shapes, and piled one on the top of the other. The mouldings of the shafts have a slenderness and delicacy characteristic of the whole of the choir and the vestibule. The slenderness is one of the chief arguments for the later date assigned to them. All the shafts have rich capitals. The next window is filled with even more curious tracery. It is divided into four lights, rising only to almost half the height of the whole window. The central mullion is thicker than the other two. Above these lights are two gables, to the crown of which the two side mullions run, through an arch below them. Above the gables are two more arches with trefoils in their heads, and in the crown of the window a circle cinquefoiled. The unusual feature of the design is the gables with the lights running through them. They were probably inserted to strengthen the wall. The next three windows are of splendid design, resembling that of the clerestory of the nave, but richer. All the mouldings are of the same character. Under the windows runs an arcade of blind tracery, two lights to each division, with a cinquefoil ornamented with a sculptured boss above. These bosses contain alternately foliage and human heads wreathed in foliage. The capitals are also ornamented with leaves and curious animals. The vault is of richly-moulded ribs, and on each side of these is a pattern of white lozenges on a red ground. The vestibule, as a whole, is one of the most beautiful parts of the minster, not less for its fine proportions and detail than for its magnificent stained glass.