The three trefoils in the centre of the wheel contain three coats of arms--the short triangular shields of the thirteenth century, of which the first is that of Edward I., the leopards of England; the second the same with a label of five points azure for his son, afterwards Edward II.; and the third that of Walter de Merton, the founder of the college. For the most part the other lights contain ornament that is wholly fourteenth century in character, but the quatrefoil on each side has a feature which shows the early date of the window. In these two small figures representing the Annunciation, though themselves in the style and colouring of the early fourteenth century, are placed directly on a background of red and blue mosaic diaper, such as one finds again and again in thirteenth century work in France, and among the fragments in the South Rose at Lincoln. I have often thought that thirteenth century glaziers sometimes kept this mosaic filling in stock, and perhaps the artist of Merton had some left on his hands and used it up here. In any case it would seem to show that the style in which he was working was fairly new to his workshop. [Sidenote: The side windows.] The fourteen side windows are designed on a plan which is typical of fourteenth century work both in England and in France, especially Normandy. The sections into which the glazing is divided by the heavy iron frame-bars are taken as the units of the design. One in each light is filled with a coloured panel--a figure under a canopy--and the rest with grisaille having a coloured boss in the centre of each, the whole being surrounded by a coloured border. The effect is that of a range of greenish-white windows just dotted and edged with colour, and with a single broad band of colour running horizontally through them all. This plan is common in all early fourteenth century work, especially in England and Normandy. Evreux is another example, York nave another, but with two rows of coloured panels, and the window from Rouen in Plate XXV. is only an elaboration of it forty years later. At Merton College, however, the canopy has not yet run mad, but is of modest proportions, figure and canopy together only occupying one section of glazing. The grisaille itself is for the most part of "bulged" quarries curving round the central bosses, but two on each side have true quarries. All have the trellis pattern formed by doubling the lead with a painted line and a continuous flowing pattern of foliage--vine, oak, ivy, and fig--spreading through it over the window from a central stem. Plate XXVI. is a later example of the same thing, but with the addition of silver stain, which is nowhere found in the Merton windows.