Notice the simple architectural canopy over this angel. All the single figures at Chartres and in most other thirteenth century windows have them, and their counterparts may be found in the canopies over the sculptured figures on the porches outside. They occur also at Canterbury over some of the surviving figures from the clerestory, but it is noteworthy that whereas at Canterbury the canopies are round arched (and the same is true of the architecture in the medallion windows), at Chartres they are nearly all either cusped or pointed, which I take as additional evidence in support of my opinion that the Canterbury work is the older of the two. [Illustration: PLATE XIX ST. MARGARET, WEST WINDOW OF NORTH AISLE OF NAVE, YORK MINSTER Fourteenth Century] In thirteenth century work these canopies are a fairly unobtrusive feature, but in the next period they were destined, as we shall see later, to be developed out of all reason or proportion. FOOTNOTES: [9] This is a later feature, and found at Bourges and elsewhere. [10] The miraculous budding of Aaron's rod was considered a type of the Virgin Birth. VII OTHER THIRTEENTH CENTURY WINDOWS [Sidenote: Salisbury and Peterborough.] A single band of craftsmen might, as far as we can now tell, have been responsible for nearly all the stained glass that was produced at any one time in the twelfth century in England and the north of France; but by the time the Trinity Chapel at Canterbury was finished, a great many such bands must have been at work, yet all deriving their art from the same source--the school of Chartres, St. Denis, and Canterbury. The output was enormous, especially in the first half of the thirteenth century. I have already spoken of Lincoln, but Salisbury and Peterborough were once rich in glass of the thirteenth century, that of Peterborough--now destroyed--being known to have been given, some of it at least, as early as 1214, and York has the famous "Five Sisters." [Sidenote: Bourges.] In France, Bourges is only second to Chartres for the quantity and interest of its early glass, which was certainly begun long before the windows of Chartres were finished. Every one knows the rose windows of Notre Dame at Paris, and besides these Amiens, Beauvais, Laon, Rheims, Tours, Soissons, Auxerre, and in fact nearly all the great cathedrals of France, contain glass of the period, while fragments of it are to be found in many parish churches both in England and France. [Sidenote: Westwell.] At Westwell in Kent, for instance, is a Jesse Tree of 1240-1250 which is well worth study, in which the details of the foliage resemble fragments of one at Salisbury and another at Troyes, and show the development that had taken place from the Jesse Trees of Chartres and St. Denis.