As mentioned in the foregoing historical notes, we have an indication that the north-west tower or “belfry” was apparently in course of construction between 1351 and 1373. To judge from some of the features of the building, it must have been a long time in erection. It was probably begun before the above date, and the lower part may have been built during the thirteenth century. The design of the angle caps (Fig. 614) which support the vaulting of the ground floor is of a decidedly first pointed character. Possibly these capitals may have belonged to an older tower, and were simply reused in the reconstruction of the existing tower. The peculiar vaulting of the ground floor of the tower (Fig. 615), and the form of the base and other details, point to a later date than that of the capitals. The upper part of the tower containing the fine belfry windows (Fig. 616) may be classed as decorated work, and probably belongs to the time (fourteenth century) of Bishop Patrick, above referred to. The spire is doubtless later, having a series of lucarnes such as are usual in the spires of the third pointed period. The effect of the tower and spire is good. It is the completest and best remaining example of its kind in Scotland. The tower is 70 feet in height, and the octagonal spire is 58 feet high. Some portions of the parapet have been altered and restored. [Illustration: FIG. 615.--Brechin Cathedral. Vaulting of Ground Floor of Tower.] The choir (see Fig. 611), so far as preserved, shows the ruins of a fine example of first pointed work. It has been without aisles, and the side walls contained a series of tall lancet windows, with plain chamfers externally, but having the wall space relieved internally with detached shafts and moulded arches, enriched with the dog-tooth. [Illustration: FIG. 616.--Brechin Cathedral. Tower and Spire from North-West.] The shafts are arranged so as to form a cluster of three smaller shafts round a larger central nucleus. They have round moulded caps, bases, and central band. The shafts are now much mutilated, but they are shown restored in the drawing. The choir, which Mr. Muir states was originally 84 feet 4 inches in length, is now reduced to three lancet windows on the north side, and one and a respond on the south side, the existing portions of the side walls being about 30 feet in length. An enriched cornice runs along the wall head above the windows. The choir, although now reduced to a mere fragment, must, when complete, have been a very pure and beautiful piece of architecture. MAISON DIEU, BRECHIN, FORFARSHIRE.