Taking the former--the baronial--for our text, we find ourselves now for the first time in a condition to discover the leading features of the Scottish school of architecture, and to connect it with the history of Scotland. We know that until the wars of Wallace and Bruce, the two countries, England and Scotland, could scarcely be said to be entirely separated; at all events, they did not stand in open hostility to each other. Endless animosities, however, naturally followed a war in which the one country tried to enslave the other, and where the weaker only escaped annihilation by a desperate struggle. It is not unnatural, therefore, to expect that the habits of the two countries diverged from each other as time passed on; and this process is very distinctly shewn in the character of the edifices used by the barons and lairds of Scotland. A very few of the oldest strongholds resemble those of the same period in England. The English baronial castle of the thirteenth century generally consisted of several massive square or round towers, broad at the base, and tapering upwards, arranged at distances from each other, so that lofty embattled walls or curtains stood between them, making a ground-plan of which the towers formed the angles. The doors and windows were generally in the Gothic or pointed style of architecture, and the vaulted chambers were frequently of the same. There are not above three or four such edifices in Scotland. The most complete, perhaps, is the old part of Caerlaverock, in Dumfriesshire; another fine specimen is Dirleton, in East Lothian; and to these may be added Bothwell, in Clydesdale, and Kildrummie, in Aberdeenshire.