Page:The ecclesiastical architecture of Scotland ( Volume 3).djvu/110

 commencement of a tower over the crossing, and a north sacristy. The nave was never erected, the arch leading to the west from the transept being built up, and having a circular window inserted therein. It is supposed that the progress of the structure was arrested by the death of the foundress, which occurred in 1463. The choir, including the apse, was 69 feet in length by 25 feet in width internally. The north and south aisles extended along the three bays of the choir, the north aisle

—Trinity College Church. Plan.

being 13 feet wide and the south aisle 9 feet wide. The apse was the full width and height of the central choir, and had a lofty window in each of its three central divisions. The transepts had small projections; the whole internal length of the transept, including the crossing, being 74 feet and the width 24 feet.

The choir and aisles were roofed with fine groined vaulting. That of the side aisles was simple, but the vault of the choir was ornamented with ridge ribs and several intermediate ribs, or tiercerons, springing from