Warwick Castle might be cited as a good example of an English castelated mansion, of the time of Richard II. But still more interesting is Haddon Hall, the residence of the Duke of Rutland, in Derbyshire. It consists of two internal quadrangles separated by the great hall, with its dais, its minstrel’s gallery, its vast open fire-place, and its traceried windows. Probably nowhere in England can the growth of domestic architecture be better studied, whether we look to the alterations which took place in arrangement, or to changes in the treatment of windows, battlements, doorways, and other features, than at Haddon Hall. English Gothic architecture has generally been divided into three periods: The Early, the Decorated, and the Perpendicular. The following condensed list of the peculiarities of each period will be found useful for reference. Early English: General proportions more slender, and height of walls and columns greater; arches pointed, generally lancet, often richly moulded; triforium and arcades often with trifoiled heads. Piers were more slender, composed of a central shaft surrounded by several smaller ones almost or quite detached; capitals concave in outline, moulded or carved with conventional foliage, delicately executed. The windows were at first long, narrow, and deeply splayed internally, the glass being within a few inches of the outer face of the wall; later in style more acute, divided by mullions, enriched with cuspated circles in the head, and often with three or more lights—the center lights being the highest. Doorways were deeply recessed, enriched with slender shafts and elaborate mouldings. Buttresses were about equal in projection to their width, with but one set off, or without any. The mouldings were bold and deeply undercut. In the Decorative style the proportions were less lofty, the arches mostly enclosing an equilateral triangle; mouldings bold, finely proportioned, and often ornamented with ball, flower, foliage of ivy, oak, and vine leaves, the execution being natural and beautiful. The Perpendicular or Tudor style had walls profusely decorated with paintings, parapets embattled, and paneled; open timber roofs of moderate pitch, but of elaborate construction, having hammer beams, the moulded timbers often richly ornamented with pierced tracery, and carved figures of angels.