The high vaults are supported by two super-imposed 13th century flying-buttresses, which are supported on one side by powerful abutments and on the other by small engaged columns, the capitals of which are decorated with crockets. (_See photos, pp. _20, 22, 24). Against the straight wall which ends the north arm of the transept are 14th century radiating arcades (_p. _30). This wall is pierced by a large rose-window set in tierce-point arch. It ends in a gable with 14th century ornament, and is flanked by two bell-turrets, one of which was destroyed. (_Photos, pp. _30 _&_ 31). To the east of the north arm of the transept, obstructing the first window of the choir aisle, is a 14th century portal with a sharply pointed gable, supported by two buttresses (_photo opposite_). The higher finish and greater adornment of 14th century decorative art is clearly to be seen here: sharply pointed gables ornamented with trefoil over the portal and buttresses, and intricately carved bouquets of foliage on the capitals, replacing the hooked crockets of the preceding century. [Illustration: DOORWAY OF THE NORTHERN ARM OF TRANSEPT.] [Illustration: NORTH FRONT. _Choir and North Arm of Transept, Nov. 1918. See description, p. _29.] =The Exterior of the Cathedral= (_Nov. 1918_). The bombardments seriously damaged the side façades of the cathedral. All the stone-work, bays, flying-buttresses and abutments, and all the roofing and framework collapsed as far as the first bays of the nave. The building is, so to speak, cut into two unequal parts throughout its entire width, by an immense gap. (_Photo p. _31, _Panorama p. _14). [Illustration: THE FIRST SHELLS TO HIT THE MAIN ROOF.] The rounded arm of the transept and the south end of the choir suffered comparatively little. On the other hand, the bombardments seriously injured the chevet and the north front of the choir. The upper part of one of the high windows in the apse was struck. A buttress of the Lady Chapel was badly broken, while two unexploded shells are embedded in the damaged stone-work of a neighbouring buttress. On the north front of the choir most of the abutments were damaged and the flying-buttresses which support it, more or less injured. [Illustration: NORTH FRONT. _North Arm of Transept, Nave and Chapelle des Œuvres, Nov. 1918._] The roofing was ruined and the framework broken. The north arm of the transept, especially the gable, was also somewhat damaged. One of the turrets surrounding it was broken off (_Photo above_). However, the north front of the nave suffered most (_photo above_). In addition to the opening made at the west end, the stone-work and roofing were injured throughout their entire length. Only the last two windows next the transept retained their mullions, the others being more or less completely destroyed. Of the flying-buttresses and abutment-piers, very little remains standing.