In A.D. 1395 it was proposed to erect a Chapter-house, and the canons in charge of the fabric (“canonigos fabriqueros”) presented in writing their reasons for not erecting it where proposed by the Chapter--at the south end of the refectory. They said that the works of the church itself ought first of all to be gone on with, and that the proposed work would destroy a good and convenient refectory, and make it obscure and ridiculous: and it seems that their report had the effect of staying the work. In A.D. 1416 Guillermo Boffiy, master of the works of the cathedral, proposed a plan for its completion by the erection of a nave; and though the chevet had an aisle and chapels round it, he proposed to build his nave of the same width as the choir and its aisles, but as a single nave without aisles. This proposition was deemed so hazardous, and created so great a discussion, that the Chapter, before deciding what plan should be adopted, called together a Junta of architects, and propounded to each of them separately certain questions, to each of which they all returned their answers upon oath. In the September following, these answers were read before the Chapter by a notary, and it may be supposed carefully digested, for it was not until March 8th, 1417, that Guillermo Boffiy, the master of the works, was called in and in his turn interrogated with the same questions. Immediately after this, on the 15th of the same month, at a Chapter-meeting presided over by the Bishop, it was decided to carry on the work as proposed, with a single nave. The story is so well worth telling in full, that I have given in the Appendix a translation of the entire document, which equals in interest any with which I am acquainted, bearing on the profession of architect in the middle ages.[323] It is valuable also, incidentally, as giving us the names of the architects of several other buildings, most of those who were examined having described themselves in a formal style as masters of the works of some particular church or churches. It is difficult to say exactly when the nave was completed, but the great south door was not executed until A.D. 1458, and the key-stone of the last division of the vault seems to have been placed in the time of Bishop Benito, so late as circa 1579.[324] In A.D. 1581 the same bishop laid the first stone of the bell-tower, and in 1607 the west front and the great flight of steps leading up to it seem to have been commenced. We have thus the story of the periods at which the church was founded, altered, and enlarged very fully told, and it now only remains to apply it to what is still to be seen in the existing building.