Plate V., Fig. 4, shows three _Lancet windows_ under a single arch or dripstone. This grouping of the windows soon suggested the design of tracery windows, in which the lights are separated by _mullions_, the simplest form being as represented in the Lichfield Chapter-house in Plate V., Fig. 9. Geometrical arrangements were invented from the simple one (Plate V., Fig. 5) to the elaborate windows and arcades of Westminster Abbey. Cusps (_spear points_) were formed in the tracery, the _Soffit-cusp_ (s.c.) projecting from the underside of the mullion, indicating early work and uncommon. All other cusps were worked on the _chamfer_ (c.c), their points being variously shaped. In Plate V., Fig. 8, the capitals were either moulded, or carved with _stiff-leaf foliage_, being _conventional_--_i.e._, designed on natural principles, but not in imitation of nature, and sometimes of great beauty, but never so delicate as to suggest its unsuitability to the material in which it was wrought. Hollows in the arch and other mouldings were enriched with the _tooth ornament_ (Plate V., Fig. 12), which occurs in the Lancet period only. Plate V., Fig. 2, shows the decoration of gables with _crockets_ and _finial_. Plate V., Fig. 3, shows _diaper_ ornaments used in wall decoration. Plate V., Fig. 6, shows a _string course_ and _dripstone_. All mouldings consist of large rounds and deep hollows, separated by fillets (a, b), and are frequently arranged in extensive groups, as in doorways, arcading, etc. The Cathedral of Salisbury is the only one which is throughout belonging to the Early English period. PLATE VI DECORATED, 1272-1377 GEOMETRICAL, 1245-1315 CURVILINEAR, 1315-1360 [Illustration: PLATE VI] PLATE VII DECORATED, 1272-1377 [Illustration: PLATE VII] PLATES VI AND VII DECORATED, 1272-1377; GEOMETRICAL, 1245-1315; CURVILINEAR, 1315-1360 The term “decorated” is applied to the work of this period because of the superfluity of its ornaments. Almost every feature was enriched with carved ornament. The predominating form is the _curvilinear_ line, the _ogee_ or _ogival_ (Plate VI., Fig. 2), Hogarth’s “line of beauty and grace,” which occurs in the lines of tracery, the shape of arches, sections of mouldings, and of foliated ornament. The Geometrical period, 1245-1315, is the overlapping of Early English and Decorated. The term Geometrical is applied on account of the window tracery, which is made up of circles and triangles more or less elaborate. The change from _Geometrical_ to _Curvilinear_ or _flowing_ tracery is demonstrated in Plate VII., Figs. 1, 2; Plate VII., Fig. 2, being a slight alteration of Plate VII., Fig. 1. Plate VII., Fig. 5, _reticulated_--_net-like_--is a common example produced in the same manner as Plate VII., Fig. 2, and is adaptable to all shapes of windows. Many elaborate and beautiful designs were produced on these principles by extension of such elements as in Plate VII., Fig. 3.