Page:Medieval Military Architecture in England (volume 1).djvu/428

 398 MedicEval Military Architecture. of the fortresses of Lancashire. It is placed upon the left, or eastern, bank of the Ribble, here the boundary between Yorkshire and Lancashire, three quarters of a mile from the stream, and about 130 feet above it. It occupies the summit and upper part of a limestone craig, which, precipitous in parts, and very steep on D its northern flank, falls, according to the dip of the rock, less steeply towards the south or south-west. Hence, the northern point was selected for the keep and upper ward, and for the lower ward and approaches the shoulder and slopes upon the south. The Roman way from Manchester, by Skipton to York, ascends the