circle would be too small to admit any large animal; but probably goats would be housed in them easily. In one or two cases I noted that the stone post forming a jamb to the entrance to the passage between the round house and the square enclosure was grooved on the inner surface. This in Dr. Sarmento’s opinion proved that the entrance to the passage was closed by a lifting hatch of wood, which to some extent confirms the idea that the back space was intended to shelter animals such as goats, as a lifting door set in a groove would be much less likely to be forced by them than a swing door turning, as the house door did, on wooden pegs. There are very few instances of party walls being utilised for two adjoining houses, though the buildings are often only a few inches apart. Even in the case of the round houses enclosed in square spaces and touching the square wall, the circular structure is quite complete at the point of contact. In one instance I measured a large walled parallelogram fronting on the principal causeway, seventeen yards in length, enclosing within it one square house of nine yards wide, and two circular houses, one on each side, the structures in each case being complete, but the circular walls in this instance merged for a few inches only at the point of contact with the square outer wall at the side. Whether these square or outer enclosures were tiled or were merely enclosed yards it is difficult to say, but that the houses themselves were so covered is evident from the immense number of well-made red shards scattered everywhere, and particularly inside the houses, the tiles being turned up at each end, so that a concave tile to cover over the joint between them would make a roof covered with them quite watertight. A door jamb and lintel in one house showed a well-carved rope moulding, but in most cases they were plain, the lintels and doorsteps containing, however, at the side a square-cut hollow, in which a block of wood was apparently inserted to receive the wooden peg or pivot which formed a sort of hinge for the door, an arrangement still adopted for the doors of barns, &c., in the neighbourhood; though Dr. Sarmento was of opinion that no wood was employed in the construction of the houses themselves, the polished rounded stones fixed to the walls in some of the houses, which Dr. Hübner considered to be bases of pillars, being in the opinion of the Portuguese archæologist seats for the inhabitants.