The famous window of the north transept, the Five Sisters, consists of five lights, each measuring 53 ft. 6 in. by 5 ft. 1 in., and is entirely of old glass. There are six windows in the north and six in the south aisles of the nave, with only a little modern glass in the tracery. The superb flamboyant window at the west end of the centre aisle measures 56 ft. 3 in. by 25 ft. 4 in., and consists, I believe, entirely of old glass, except the faces of the figures. The clear-story windows are studded with ancient shields, but a great part of the glass is, I fancy, modern; those of the vestibule, 8 in number, measuring 32 ft. by 18, are of old glass, including the tracery lights. And in the Chapter House the seven windows, of five lights each, are filled with old glass. The east window has been clumsily restored by Willement. In the side windows of the transepts there is some old glass, and the great rose window over the south entrance still retains much of the old glass; while far overhead in the tower there are some really fine bold designs of late, but genuine, design and execution. Altogether, according to actual measurements, there are 25,531 superficial feet of mediæval glass in the Minster, _i.e._, more than half an acre--a possession, we should think, unequalled by any church in England, if not in Christendom. But the difficulty in describing the glass arises from the fact that many of the windows are composed of fragments of glass of different dates, which, for various reasons, perhaps to preserve them, have been interchanged during past generations. The educated eye of the glass painter can detect splendid specimens of every school of glass painting throughout the Minster, but sometimes comparatively small portions isolated in the midst of glass of a totally different period. The Five Sisters window is an almost complete specimen of Early English glass, with an elaborate geometrical pattern formed by the conventional foliage of the _planta benedicta_, but at the foot of the central light there is a panel consisting of distinctly Norman glass, portraying Jacob's dream, or Daniel in the lion's den, for it is indistinct, and critics differ. The suggestion is that this panel formed part of the previous window, in the old Norman transept, and, for some unknown reason, being specially valuable, was preserved and incorporated in its successor. The tracery lights of the vestibule windows are filled with old Norman glass, and the late Canon Sutton was of opinion that the stone tracery had been specially designed to suit it. The clear-story tracery in the nave contains also much Norman glass, probably from the old Norman nave, and in many other windows we can trace similar insertions. [Illustration: Transept, Lantern, and Five Sisters' Window]