with that of the south transept--the great window having double splays on the outer ingoing, and tracery, mullions, and transome similar to those of the south window. The angle buttresses and pinnacles, and parapet with corbel course, enriched with rosettes and gargoyles, all correspond at both ends of the transepts. The upper part of the north side of the choir is also seen in this sketch. It had a plain parapet with bold gargoyles, and in each bay [Illustration: FIG. 1019.--Trinity College Church. Window Jamb.] a moulded window in which the original tracery was preserved. This showed a central mullion with quatrefoil in the arch-head, and the smaller arches foiled or cusped. The buttress at the sacristy was well preserved. The pinnacle was apparently original and of good design. On the front of the buttress a small additional pinnacle was introduced, which would give considerable character to the design. Fig. 1018 shows that the same arrangement was evidently adopted in the corresponding buttress on the south side. The arches of the flying buttresses are also visible in the sketches of both sides of the church. The roof of the north aisle seems to have been covered with stone slabs.[53] A building 17 feet in length by 16 feet in width internally projected from the north wall. It is sometimes called the chapter house, but was more likely the sacristy. It had a round-headed doorway opening into the north aisle (Fig. 1022), a good window to the east, and a smaller square-headed window to the west. There are two ambries in the west and north walls, a fireplace in the north wall, and a squint window in the south-east angle commanding a view of the high altar. At the north-east angle there was a buttress with a pinnacle, and at the north-west angle (see Fig. 1021) an octagonal projection, which, doubtless, contained a wheel stair to an upper floor, the window of which is seen in the sketch. The roof was covered with stone slabs, and a chimney with battlement ornament crowned the north gable. The fireplace of the sacristy is said to have comprised a fine specimen of a Gothic chimney. Fig. 1023 shows the interior of the south transept. The transept had no aisles or chapels. The main arches of the crossing spring from clustered responds against the walls with carved caps, and the groined vaulting of the transept--which was similar to that of the choir--with its numerous moulded ribs enriched with bosses, is seen springing from wall shafts and corbels. The south window, with its mullions and [Illustration: FIG. 1020.--Trinity College Church. South Porch and South Transept.] [Illustration: FIG. 1021.--Trinity College Church. North Transept and North Side of Choir.] tracery, is also well shown. A small circular window, with eight bold cusps, was inserted within the western wall arch.