Buttresses project boldly, and flying-buttresses become a prominent feature. There is a fine example of a compound flying-buttress at Westminster Abbey, which supports the vaults of the choir, the triforium and the aisles and carries the thrust of the whole over the cloister to the ground. Early English towers are generally more lofty than the Norman, and their buttresses have a greater projection. The spire is usually a noticeable feature. The East End is usually square; but sometimes terminates with the apse, generally a half-octagon or a half-hexagon, as at Westminster Abbey. “Throughout the Early English period there is an ornament used in the hollow mouldings which is as characteristic of this style as the zigzag is of the Norman; this consists of a small pyramid, more or less acute, cut into four leaves or petals meeting in the point, but separate below as in Chester Cathedral. When very acute, and seen in profile, it may be imagined to have somewhat the appearance of a row of dog’s-teeth, and from this it has been called the ‘dog-tooth[1] ornament,’ or, by some, the shark’s tooth ornament, more commonly the tooth-ornament. It is used with the greatest profusion on arches, between clustered shafts, on the architraves and jambs of doors, windows, piscinas and indeed in every place where such ornament can be introduced. It is very characteristic of this style, and begins quite at the commencement of the style, as in St. Hugh’s work at Lincoln; for though in the Norman we find an approach to it, in the Decorated various modifications of it occur; still the genuine tooth-ornament may be considered to belong exclusively to the Early English.