In the year 1174, four years after Becket's death, the splendid choir built by Prior Conrad in 1130 was completely destroyed by fire, and the monks immediately set about building a new one. Gervase the monk has left a detailed account of the progress of the great work, year by year and pillar by pillar, for the space of ten years, first under the French master-builder, William of Sens, and then under his successor, William the Englishman ("little in body but in workmanship of many kinds acute and honest"), so that we know just when each part of the work was finished. Now in the spring of 1180, he relates, the monks had a great desire to celebrate Easter in the new choir, and to gratify them the master, by a special effort, succeeded in getting the building finished and roofed in almost to the east end of the choir, where he placed a hoarding to keep out the weather. Since we are told that in this hoarding there were three glass windows, it seems reasonable to suppose that the other windows were glazed too. Now since both the windows in the north choir aisle and, when in its original position, the Methuselah on Plate III. were well to the westward of the point at which the hoarding was erected, I have no doubt that they were in position by this date, in which opinion I am confirmed by the character of the glass itself. That in the Trinity Chapel to the east of the hoarding would naturally be later. The same arrangement seems to have been followed at Canterbury as elsewhere of having large figures in the clerestory and small medallions in the lower windows. The Methuselah, which seems to have formed one of a series of Patriarchs,--of which three others remain, which filled the windows in the clerestory of the choir,--is a particularly dignified figure, and it is noticeable that the throne he is seated on is of somewhat the same type as that of Notre Dame de la Belle Verrière at Chartres. As in all windows of this date, the flesh is executed in glass of a brownish-pink colour instead of white, which later on became the rule. This illustration shows very well the early method of painting. Where possible, as in the rich blue of the background, the glass is left quite clear. The folds of the drapery and the features are drawn in sure and vigorous line work. Diaper is used very sparingly, only when it is necessary to "keep back" and subdue a piece of glass, as in the case of the green cushion to the throne and the border of the tunic. If you can imagine the glass with these pieces left clear or with any other piece diapered, you will see how unerring has been the artist's judgment.[7] The letters of the inscription are scratched out of a dark ground of enamel. This is the invariable method used in early glass, which indeed is always (except in grisaille, of which more later) conceived as a light design on a dark ground. In the fifteenth century the reverse was the case, and then we get inscriptions in dark lettering on a light ground.