When the changes began, the Fabric Rolls, if they "do not entirely desert us," give us but meagre help, so that the exact date and cost of each detail is only to be guessed at. Stapledon probably intended, as early as 1325, to begin the work of recasting the nave. In that year he made purchases of "15 great poplar trees bought for scaffolds, and 100 alder trees." Further entries tell us of seven and eightpence worth of timber "bought by the Bishop at London," and "48 great trees from Langford." The work hitherto attempted by Stapledon did not demand an outlay of this kind; so, though Grandisson gets the honour of having finished the nave, something is due to Stapledon for having given the initiative. The large balances of the preceding nine years had left a great sum of money in the latter's hands, and a donation of Stapledon's further increased that balance by the substantial sum of L600. In January, 1333, is a record of William Canon's bill for marble he had been commissioned to furnish. He had agreed to supply the Purbeck pillars for the nave, receiving L10 16s. for eleven large columns, and 5s. a-piece for bases and capitals. This is one of the most interesting items we have of the building and cost of the cathedral, and occurs fortunately at a time when such information is unusually scanty. In addition to the above-mentioned Purbeck marble, stone from the quarries of Caen in Normandy, and other places nearer home, was procured in large quantities. In 1338 the bishop gave permission to the Dean and Chapter to obtain from his agents at Chudleigh "twelve suitable oaks from his wood there." About 1350 the building of the nave was completed. It was extensively restored in recent years under the guidance of Sir Gilbert Scott. The Purbeck columns had fallen into a most dilapidated state, and were carefully repaired, the material used being obtained from those spots which had supplied the original builders. The view of the nave as one enters the west door is most impressive. Its full height of seventy feet is not dwarfed by the unhindered stretch of roof. The groined and ribbed roof itself is of marvellous beauty and springs from slender vaulting shafts, of which the bosses are exquisitely carved with a strange mixture of religious and legendary figures, foliage and animals. The artists seem to have ransacked the whole universe for subjects, and to have interpreted their ideas with great cunning. The corbels that support the vaulting shafts are equally elaborately carved. [Illustration: THE NAVE, LOOKING WEST. The Photochrom Co. Photo.] [Illustration: CORBELS AND BOSSES (FROM BRITTON'S 'EXETER,' 1826).