Before crossing the threshold into the two next periods (the Decorated and Perpendicular), it is worth pausing to notice that although architecture generally tends to elaborate as time goes on, the opposite was true in England during the two centuries of which we are about to speak. In fact, the work of the earlier of these two epochs obviously deserves the title of “Decorated” and the later does not. Its glass, too, is much more florid than its successor, and is far more ambitiously ornamental. It bears many bits of leafy foliage, twining vine tendrils, &c., all drawn as true to life as possible. Later these bits of flora are rarely used, and then only in a conventional and, therefore, less decorative form. In our introduction we have stated that in England, the arrival of the fourteenth century does not show the abrupt difference found in France between the light-obscuring mosaic glass of the thirteenth century and the fainter tints of the fourteenth, permitting the brighter interior then demanded. The explanation seems to be that the English, having been early forced by cloudy skies to use light-admitting grisaille (either alone, or combined with their early medallions) already enjoyed the proper illumination which, at the beginning of the fourteenth century, was so lacking in France as to bring about a cry for light at any cost. In place of the early fourteenth century glare that strikes one at Sées, Evreux, and in St. Ouen at Rouen, we have rich strong colour in their contemporaries at Tewkesbury, Wells and Bristol. Occasionally grisaille will be found pleasantly combined with small coloured scenes, as at Dorchester and in Merton Chapel, Oxford, but even then it seems much like a local survival of the thirteenth century tradition. So much for the difference between the English Decorated and the French fourteenth century windows. Now let us briefly consider what it was that succeeded to the mosaic medallion style seen at Canterbury, Lincoln, &c., and also what causes must have been at work to produce the change. About the end of the thirteenth century there chanced to be discovered a method of producing yellow which obviated the necessity of cutting out a piece of glass of that tint and laboriously leading it into the picture where needed, as was still obligatory if they wanted blue or red, &c. Some lucky glazier stumbled on the fact that if chloride of silver be put on a sheet of glass it would, when exposed to the fire, produce a handsome golden stain, and that only at the points to which it was applied. Many stories are related to explain this discovery, but as they are all more pleasing than convincing, it seems best to credit Dame Fortune with this valuable assistant to the glazier. It is obvious that this facility in staining a touch of yellow just at the point desired by the artist was eagerly seized upon. He at once made use of it to decorate the robes of great personages, or to brighten the hair of women and angels, as well as to liven any bits of stonework necessary to his drawing. It made possible the development of an unimportant detail in the earlier windows into the perfected result called the “Canopy window,” which we shall learn to know as a most useful and satisfactory combination of decoration and serviceability. It will be remembered that from the earliest times there frequently appeared above the heads of saints certain conventional coverings meant to indicate an architectural shelter. Upon the arrival of the Decorated period this detail became more complete, the roof being fully depicted (although as yet in flat drawing, with no attempt at perspective) and columns added at the side to support it, thus completely enclosing the little figures in a niche. Here we have the first, or Decorated canopy, now complete in form although crude. It must be noticed, however, that these canopies, generally drawn to a small scale, do not attempt alone to fill the embrasures, and either are shown in bands across a ground of grisaille or occur alone surrounded by grisaille. Their architectural portion is of a strong brassy yellow, that colour being provided by pot metal glass leaded in. Now comes the next and final development. The discovery of yellow stain did away with the laborious need for leading in the yellow bits to simulate stonework, so the limit as to size of the canopy was removed, and at once they began to increase in dimensions. The obvious result ensued, each canopy was made to fill an entire lancet, its simulated stonework occupying as much surface as the enclosed figure, and we have the logical whole of a decorative colour panel within surrounded by a frame of lighter panes which admit the necessary amount of illumination. So satisfactory did this style of window prove that it persisted longer than almost any other type of glazing, and we must remember it is the discovery of yellow stain that we have to thank for making this result possible.
During the period we are now considering, the canopy was, of course, rather crude, in fact it looked more like a sentry-box than anything else. There was as yet no pedestal beneath it, and the pinnacles at the top showed entire ignorance of perspective, as well as of drawing in relief. During the Perpendicular period that followed, they did little but elaborate this canopy idea, combining and softening the colours so as to prevent jarring contrasts, and generally much improving the logical combination of a coloured central portion surrounded by light-admitting canopy framing. Without the use of yellow stain all this would have been difficult, if not impossible, for without the little touches of gold livening the grey stonework these canopies would have been dull and unconvincing.
Nor was this the only novelty in the method of imparting colour to glass. They now began to enrich their palettes by coating one colour with another, thus getting a tint not before obtainable. For example, red on blue gave a rich purple, blue on yellow a fine green, &c. This was effected in a very simple manner. Suppose the glass-blower wanted a purple—he dipped his pipe into liquid blue glass, and started to blow his bubble. When it began to take shape he dipped the small bubble into liquid red glass and then finished his blowing. This last dipping of course coated the outside of the blue bubble with red, and when it was completely blown, cut and opened out, it produced a sheet which was red on one side and blue on the other. Held up to the light, the red and blue combined to produce purple. Nor did the glass-blower confine himself to combinations of two colours, for the writer knows of an instance in France showing six superimposed coats. The French call this “verre doublé” (or lined glass), a very descriptive name. In passing we may say that although this manner of colouring glass first reached prominence during the Decorated period, it was but an elaboration of the way the ruby or red glass had always been made, i.e., coated on to the colourless glass.
We have said that the earlier canopies did not have pedestals below them. This lack was soon noted, and the need was felt for something to complete them below; the first expedient hit upon for this purpose was shields gay with heraldic tinctures. Not only were these decorative, but we shall learn at Tewkesbury and Gloucester how valuable they have proved to be in enabling those learned in heraldry definitely to date windows whose histories have long since been forgotten.
It must not be overlooked that the architect had much to do with the development from the mosaic to the canopy style. He decided to change from the wide single windows that one sees at Salisbury, and to substitute for them groups of narrower lights separated only by slender stone mullions and all bound together at the top and tapered off by a pyramid of smaller openings called tracery lights. These latter will be particularly enjoyed by the glass-lover while studying this period, for the Decorated glazier was singularly happy in his treatment of these smaller panes—much more so, in fact, than his successor of the Perpendicular era, who was obliged to conform to the stiff little pill-boxes provided for him by the architect. The use of vines and leaves was of great assistance in this problem of treating small irregular openings; nor were these the only motives—at Wells there is a very happy use of busts filling small trefoils.
Besides the canopy treatment, the English glazier of the Decorated period was very fond of the Tree of Jesse theme, and, as is usually the case with congenial tasks, obtained most satisfactory results. He used it to great effect in his broad windows made up of several narrow lights, separated by slender mullions. The very shape of these windows invited this design, because a separate branch of the vine bearing its little personages could be run up each lancet without disturbing the coherence of the picture. The men of that time used the Tree of Jesse nearly as much as did their fellow craftsmen across the Channel during the sixteenth century. In France the descendants of Jesse almost always appear as blossoms on the vine, but their earlier English prototypes usually stand in small cartouches formed by convolutions of the vine. This brings us to yet another reason why the Decorated glazier liked the Tree of Jesse. We have already stated that he was much given to introducing leaves, tendrils, &c., done in the natural manner, which, of course, made him entirely at home in delineating the great vine rising from the loins of the Patriarch. What success he achieved with this style of window we shall judge for ourselves at Ludlow, Bristol, and Wells.
A convenient touchstone for deciding whether a window belongs to this or the next period is provided by an examination of the manner in which the artist executed his shading. It was smeared upon Decorated glass, and a close inspection will reveal the streaky lines. During the Perpendicular epoch the shading was stippled on with the end of a brush.
To recapitulate, the distinctive features of the Decorated epoch may be enumerated as follows:
1. Windows of several lancets, with tracery lights above them.
2. Decorative treatment of tracery lights.
3. Yellow stain.
4. Coated glass (several layers of different colours).
5. Deep rich colouring.
6. Canopies.
7. Use of leaves, vines, &c., copied closely from nature.
8. Tree of Jesse windows.
9. Shading which was smeared on.