a solid wall between the choir and the north aisle, it has evidently been intended, from the size of the east windows and also of those on the south side, to provide sufficient light by them to make up for the want of light from the north. The kind of tracery which filled these windows cannot now be ascertained, but it may have been of the same character as that of the windows of the west end. The tracery, which existed till recently in the choir, was clearly a late restoration. The pinnacles on the south buttresses and the upper part of the choir wall are also of very late date. These have apparently been restored by Bishop Chisholm, whose crest they bear, about the year 1500. It will be observed that the north aisle of the choir stops short by one bay of the length of the choir, so as to allow the presbytery to be lighted, as is usual, by windows on three sides. The choir is 81 feet in length by 28 feet in width within the walls. [Illustration: FIG. 514.--Dunblane Cathedral. Door from Choir to Lady Chapel. Details.] [Illustration: FIG. 515.--Dunblane Cathedral. Plan of Clerestory Window.] We now come to the most beautiful part of the structure, viz., the nave. It measures internally 129 feet in length by 57 feet in width (including the aisles), and is divided into eight bays. The four eastmost bays and the westmost bay are 10 feet in width between the piers, while the three bays next the westmost bay are 12 feet between the piers. A similar difference is observable in the upper part of the structure, which consists of the clerestory, there being no triforium (Fig. 516). The clerestory is constructed with an outer and an inner wall (Fig. 515), having a passage between them in the centre. In the outer wall are the windows, which have two lights formed by a central mullion, with plain splays on the jambs and pointed arch (Fig. 517). The arch head is filled with a form of tracery consisting of a quatrefoil cut in a plain circular panel, being thus an intermediate example between the perforated panel of early first pointed work and the bar tracery of the [Illustration: FIG. 516.--Dunblane Cathedral. Elevation of Bay of Nave.] [Illustration: FIG. 517.--Dunblane Cathedral. West End from South-West.] decorated period. On the inner side of the clerestory gallery an arcade (see Fig. 515) is more elaborately carried out. Each bay contains two arches forming a continuous arcade, resting on clustered shafts with rounded caps and bases of first pointed style. The arch mouldings are [Illustration: FIG. 518.--Dunblane Cathedral. Interior of North-West Angle of Nave.]