Here the arches, with few exceptions, are pointed; but otherwise the design of the two churches is just the same. The nave has a pointed barrel-vault; the triforium, however, has quadripartite vaulting throughout, in place of the half barrel-vaults used at Santiago; and the buttresses externally are connected by a series of arches below the eaves. The triforium consists in each bay of two pointed arches under a round enclosing arch, carried upon coupled shafts, which have rudely sculptured capitals. The five eastern bays of the nave appear at first sight to have no arches opening into the aisles; but upon closer examination the outline of some low arches will be found behind the stall work of the Coro. These arches are all blocked up; but if they were originally open they are so low that they could not have made the effect very different from what it now is. It looks, in fact, at first sight, as if the present arrangement of the Coro were that for which the church was originally built, and as if the nave proper was always that part only of the church to the west of the present Coro which opens to the aisles with simple pointed arches of the whole height of the aisle. But on further examination we find that the vaulting of the aisles in the four eastern bays is a round waggon-vault, and this, of course, limited the height to which it was possible to raise the arches between the aisle and the nave; and it is therefore probable that their height is not to be attributed so much to the wish to define a Coro in the nave, as to the fault of the architect, who did not at first perceive the advantage of using a quadripartite vault instead of a waggon-vault. The three bays west of these have the former kind of vaulting without ribs, and with windows both larger and higher from the floor than the simple round-arched openings which light the four eastern bays. The eighth and ninth bays are evidently rather later than the rest; and the western bays, again, are quite subsequent additions. The crossing has a quadripartite vault, and the transepts waggon-vaults like those of the nave. [Illustration: No. 15. LUGO CATHEDRAL. p. 131. INTERIOR OF TRANSEPT, LOOKING NORTH-WEST.] [Illustration: LUGO:--Ground: Plan: of: the: Cathedral: Plate VII. W. West, Lithr. Published by John Murray, Albemarle St. 1865.] It is pretty clear that the work was commenced upon the scheme which we still see in the bays next the crossing, and carried on gradually with alterations as the work went on, and probably as it went on the architect discovered the mistake he was making in confining himself to waggon-vaulting in the aisles. It is somewhat remarkable that, with the example of Santiago so near, such a scheme should ever have been devised, unless, indeed, the work was commenced earlier than the date assigned, of which I see no evidence.