There are one hundred and seventeen of these subject panels. Thornton would seem to have begun at the top with the idea of telling the whole story of the Old Testament, or perhaps that of the entire Bible, but by the time he had finished the upper tier, which contains three rows of panels, as compared with five in each tier below, and carried the story as far as the death of Absalom, he, or more probably his clients, seem to have changed their minds, for the rest of the window, with the exception of the bottom row panels, is devoted to the illustration of the Apocalypse, beginning with the torture of St. John under Domitian and his banishment to Patmos. John Thornton was a greater draughtsman than Thomas of Winchester, and the portrayal of these scenes is far in advance, from the pictorial point of view, of anything that had been done in glass up to that time. Here again one feels, as in the best days of the Early Period, that one can take pleasure in the actual technique of the painting, but it is a different technique to that of the Early Period. The line work is still wonderfully precise and expressive, but it is more delicate than before, and is helped by delicate modelling in "matt shading," while the drawing itself is in a much more modern convention. It is, indeed, the first example in stained glass of a style of drawing which was to hold the field in England till nearly the end of the century, and to John Thornton is due, probably, the credit of its introduction. [Sidenote: Its colouring.] As a colourist, however, John Thornton is even greater. This window stands almost alone in England, if not in Europe, for the way in which colour is made use of as a means of expression. Elsewhere in York the successors of John Thornton seem to have been content with a merely decorative distribution of red, blue, and silver stain in their subjects, but here each scene has its appropriate colour scheme, the creation of fishes, for instance, being a lovely harmony of blue and silvery white, while the scenes in Eden are a glory of spring-like greens and gold. [Sidenote: Its construction.]