In passing from the Middle Pointed to the Late Pointed periods in Scotland, we do not find any distinct break in the style of architecture such as exists between the First and Second Pointed periods. The middle pointed style passes by gentle gradation into the late pointed style, and there is some difficulty in fixing the period when the one ceases and the other begins. When buildings such as Melrose Abbey and Lincluden College are compared with Dunglass, Corstorphine, and other collegiate churches of the late period, the difference of style is very apparent, and it is at once seen that these edifices belong to different categories. But between such examples as Haddington Church and Paisley Abbey the distinction of style is not at first sight so striking. It is only when the whole character of the architecture is considered that it can be determined to which category each structure belongs. Although the line of division is thus to a certain extent arbitrary, there are some characteristics of the third pointed period which are peculiar to it, and render it a distinct and well marked epoch. This period, although inferior in many respects to those which preceded it, yet comprises more than any other certain elements which give it a claim to be considered peculiarly Scottish and national. Many of the structures described in Vol II. as belonging (in part at least) to the decorated period bear some resemblance to those of the same style in England. These edifices are mostly of considerable size, and contain all the usual divisions of choir, nave, and transept, nearly always with aisles. They are also generally vaulted with groined vaults, having wooden roofs above the vaults. The details of the buildings are likewise of similar character in both localities. As in the preceding period, the large churches of the third pointed period in Scotland are nearly all restorations. No new churches of great size were undertaken. Some of the older large churches which had been damaged were reconstructed, but the new churches erected were almost entirely confined to parish or collegiate structures. The largest new church is that of Trinity College in Edinburgh, founded by the widowed queen of James II. Only a few of the larger of these churches have aisles, and are roofed with groined vaulting.