To perfect S. Paul's some things had still to be done, and, rather than these should suffer, Wren was willing still to undergo the slights and annoyances of the other S. Paul's Commissioners, amongst whose names one wishes that of Sir Isaac Newton did _not_ appear, without clear evidence that he stood by his early patron and friend. One hopes it may have been so, certainly he was not a frequent attendant at the meetings. [_DECORATION OF S. PAUL'S._] Within the Cathedral there was some important work to do. Gibbons' carving had to be completed, and the beautiful iron-work gates on either side of the choir had yet to be set up. For this work Wren employed a M. Tijou, at that time a famous worker in iron, though no account of him is to be obtained at the present day. Possibly he was one of the French refugees. Wren saw both the carving and the gates successfully finished. But for the east end of the Cathedral he had a magnificent design which is unfulfilled to this day. He intended to inlay the columns of the apse with rich marble, to use a considerable amount of colour and gilding, and to place over the Altar a hemispherical canopy supported on four writhed pillars of the richest Greek marbles, with proper decorations of architecture and sculpture: he had prepared his model and the needful drawings, Bishop Compton had even received some specimens of marble from a Levant merchant in Holland, but unluckily the colours and the class of marble were not what Wren desired, and the plan waited for a better opportunity, which, in Wren's lifetime, never came. Thus, of all this grand design, the only trace is the painting of the apsidal pillars, in imitation of lapis lazuli, which was meant as a temporary experiment, and the model of the canopy in the possession of the Dean and Chapter. Hardly anything could be done which would more enhance the interior beauty of S. Paul's than the erection of this canopy. Besides the adornment of the east end of the Cathedral there was also that of the dome to be accomplished. The decoration of S. Paul's is so vexed a question that one almost fears to touch upon it, but the statement in the 'Parentalia' is explicit.