The most important military post in Athol was Blair Castle. The house which now bears that name is not distinguished by any striking peculiarity from other country seats of the aristocracy. The old building was a lofty tower of rude architecture which commanded a vale watered by the Garry. The walls would have offered very little resistance to a battering train, but were quite strong enough to keep the herdsmen of the Grampians in awe. About five miles south of this stronghold, the valley of the Garry contracts itself into the celebrated glen of Killiecrankie. At present a highway as smooth as any road in Middlesex ascends gently from the low country to the summit of the defile. White villas peep from the birch forest; and, on a fine summer day, there is scarcely a turn of the pass at which may not be seen some angler casting his fly on the foam of the river, some artist sketching a pinnacle of rock, or some party of pleasure banqueting on the turf in the fretwork of shade and sunshine. But, in the days of William the Third, Killiecrankie was mentioned with horror by the peaceful and industrious inhabitants of the Perthshire lowlands. It was deemed the most perilous of all those dark ravines through which the marauders of the hills were wont to sally forth. The sound, so musical to modern ears, of the river brawling round the mossy rocks and among the smooth pebbles, the dark masses of crag and verdure worthy of the pencil of Wilson, the fantastic peaks bathed, at sunrise and sunset, with light rich as that which glows on the canvass of Claude, suggested to our ancestors thoughts of murderous ambuscades and of bodies stripped, gashed, and abandoned to the birds of prey. The only path was narrow and rugged: a horse could with difficulty be led up: two men could hardly walk abreast; and, in some places, the way ran so close by the precipice that the traveller had great need of a steady eye and foot. Many years later, the first Duke of Athol constructed a road up which it was just possible to drag his coach. But even that road was so steep and so strait that a handful of resolute men might have defended it against an army; [355] nor did any Saxon consider a visit to Killiecrankie as a pleasure, till experience had taught the English Government that the weapons by which the Highlanders could be most effectually subdued were the pickaxe and the spade.