Nearly the same must be said of a rectangular space, dotted and intersected with foundations and upright beams marked _T T_, and lying out in front of the south wing on the denuded and thinly soiled apron forming the southern spur of the "body" of the _mesilla_. Its eastern line, a double stone wall sunk 0.50 m.--20 in.--into the soil, is 8 m.--26 ft.--long from N. to S. From its southern extremity similar foundations run to the west 37 m.--120 ft.,--thence 8 m.--26 ft.--north, and 37 m.--120 ft.--east back to the first line. Thus a rectangle of 8 m. × 37 m.--26 ft. × 120 ft.--is formed, within whose area, especially in the western portion, upright beams start up in something like a semicircle, which would indicate that the structure was once a building. A metre and a half to the north, a foundation wall runs about 20 m.--66 ft.--E. and W.; and at both of its extremities a corridor ascends towards the south wing of _A_. The nature and object of these fabrics are equally a mystery to me. Attached to the S.W. corner of the south wing is the annex of which I have already spoken. It is an elevated rectangle of 24 m. × 9 m.--80 ft. × 30 ft., and is clearly divided into compartments of 3-1/2 m. × 3 m.--12 ft. × 11 ft. The whole is not much more than a stone mound of oblong shape, but it contained on its ground-plan 21 chambers. I presume, from the mass of _débris_, that it had an upper story. Its eastern row of cells is a direct continuation of the most westerly row of the S. wing. Due south of this annex, and almost touching it, there are two structures marked _O O_ which are very remarkable. They are octagonal. The most easterly one is best preserved, and appears to be the largest. Its two lateral walls are each 4 m.--13 ft.--long, the transverse 5.34 m.--18 ft.,--and the corners are cut off sharply by intersections of 0.86 m.--3 ft.--in length, so as to give the whole eight sides. The walls are well defined; the corners sharp and still one metre high. They are of the usual thickness. The other structure is so ruined that it appears round. These buildings, according to Sr. Vigil, were store-houses also; and they favor the suspicion that those marked _S S_ south of the east wing had the same shape. As they now appear, they look like the ruins of octagonal towers. The stone-work is like that of the estufas, but they are erected exclusively above the ground, and still cannot have been very high.