A master hand has so often described the glens and ravines of Scotland, that it seems vain and presumptuous to meddle with them; and yet we must ask our readers to figure to themselves a sharp cleft sloping downwards to a brawling mountain stream, the sides scattered with gray rocks of every imaginable size, interspersed here and there with heather, gorse, or furze. Just in the widest part of the valley, a sort of platform of rock jutted out from the hillside, and afforded a station for one of those tall, narrow, grim-looking fastnesses that were the strength of Scotland, as well as her bane. Either by nature or art, the rock had been scarped away on three sides, so that the walls of the castle rose sheer from the steep descent. . . .