There is some glass in the Lady Chapel which seems older than the east window. I have already alluded to the third window from the east in the south aisle which represents a stage of development corresponding to the earlier work of the Winchester School in the west window of Winchester Cathedral and the east windows of New College antechapel. The three lights contain three figures, St. Edward the Confessor between St. James and St. John the Evangelist, unless the former figure is also St. John appearing to the king as a pilgrim, as in the well-known story. Below are small scenes of the Massacre of the Innocents, Christ among the Doctors, and the Baptism in Jordan. The figures still have something of the S-like curve of the fourteenth century, but the canopies are white and of the transitional type. Perhaps the most interesting things in the window are the quarry panels at the bottom, which have a continuous flowing pattern of oak foliage running through the quarries, but with birds perching on it, so arranged that a bird comes in the centre of each quarry. [Sidenote: Thornton's successors.] There is some similar glass to this in the clerestory, but, with this exception and that of a fourteenth century window in the south aisle which has evidently been moved from the nave, the rest of the glass in the choir and Lady Chapel is the work of the school which was either founded by John Thornton at York, or at least profoundly influenced by him. It seems probable to me that it was in their work, which is found not only in the Cathedral but also in most of the parish churches of York, that the Perpendicular style in glass finally crystallized into the form which, with minor local differences, became universal throughout England. Details from their work may be seen in Plates XXXIV.-XLIII. In one respect, namely in colour, they did not, as I have said, follow John Thornton, limiting themselves, for some reason unknown, very much to ruby, blue, and yellow stain. Plate XXXVIII. is a good instance of their method (the background of Plate XXXVI., it must be remembered, is modern). The blue is of a greyish quality, quite different from that of early times, but pleasant, and with a good deal of variety in it; a blue-black was sometimes used, as in Plate XXXVII., for monks' dresses. [Sidenote: A Jesse Tree.]