No historical document exists that can apply to the building of the nave; but that must have come next, and have been in progress almost before the north transept could have been finished. The west front was commenced somewhere about the beginning of the last quarter of the thirteenth century, and, including the two towers which form such an important part of it, must have taken a very long time to complete. From the thorough examination made when the recent restorations were in progress, it was decided that these towers were built in three distinct stages--the lowest, which just included the row of kings, being assigned to about 1280; the next stage to 1300; and the upper part, including the belfry windows, to about 1330, while the spires were not finished till some time after. Walter de Langton became bishop in 1296, and of him it is distinctly recorded that he commenced the Lady Chapel. From an old register in the Salt Library at Stafford, it appears that Langton left £80, 13s. 3d. for the building of the chapel. He died in 1321. And, in 1323, there is another entry showing that the chapter came to some agreement with his executor by which each party should pay half the cost of finding a quarry for the stone; so that it does not appear that building operations had proceeded very far at his death. It is interesting to note, as the same source shows us, that the money left by the bishop was partly on loan to King Edward II. for the expenses of his wars with Scotland, which wars had ended so disastrously at Bannockburn. In the following reign, Edward III. was asked by the chapter to repay what was still owing of this money.