The round houses are usually about fourteen feet in diameter, and the walls remaining rarely rise above four or five feet from the surface. The doorstep is usually raised a foot or so above the level of the ground. One round house has been tentatively rebuilt by Dr. Sarmento on the level space on the top of the hill, an unattractive beehive-looking structure without windows, but later investigation convinced him that he had built it too high; and that it should not be of so great an elevation as the measure of its diameter. The principal thoroughfares running transversely on the slope of the hill are carefully walled upon the scarped inner side, and in some cases the stone water channel runs alongside of it. On reaching the bare space at the very summit of the hill, upon which the little modern Christian chapel stands, a good idea may be formed of the whole plan of the place. The town, covering perhaps five or six acres, all lies over the crest and down the south and south-west slopes. The wall by which we entered from the south is apparently the inner wall of three, and practically encloses the top of the hill and the centre of the town on the slope. The second wall, which shows signs of a moat, is of greater extent, following the irregular contour of the hill, whilst the third or outer defence extends far down almost to the plain on the west and south-west side; traces of buildings, although but little explored, being very abundant between the two inner walls on the south and south-west, and clearly defined paths leading down from the main city to the outer defences and the suburbs. In consequence of the formation of the ground, attack was to be looked for mainly from the most accessible point, namely, the north-east; for here the three lines of defences are almost close together, and each of the walls is here brought to a rough angle. From the apex of the outer wall on this side there are indications of another defence running straight out at right angles along the saddle which connects the hill with an outlying spur easy of approach, and at the end of this long projection there appears to have been two parallel horizontal outworks running across the end of the saddle, this being the vulnerable point of the fortress. It is easy to imagine how almost impregnable such a place could be made. The hill at any other point than this could only be scaled, if at all, with the greatest difficulty, and the huge boulders on its side would enable even weak defenders under their cover to hurl down stones or spears upon an advancing foe. The south side of the hill is the least accessible of all for any considerable body, and there the defences are the most distant and the weakest.