which seem to be places where they set poles to oppose against those others leaning on the out-side that bear the sail-cloths. The section or profile of this work is contrived with exquisite judgement in proportioning its parts; for the eye of a man standing at the most retired part of the terrace next the parapet is in the right line of the declivity within side; of a man standing in the middle of it, his eye sees the heads of the spectators sitting under him on the upper _subsellia_, even with the line of the circular walk; the eye of him standing on the edge of the terrace, sees the heads of those on the lowermost _subsellia_, even with the edge of the _podium_, and commands the whole _area_: therefore we may conclude none were permitted to stand on the circular walk, for that would have obstructed the sight, but it was left open for passage. I took notice before, that on both sides, the terrace at the top of the lower half seemed to me narrower than that at the other and principal half: whether so originally, and for sake of any advantage to be had in this respect, and that the meanest of the people stood here, or that it has happened to have been more wasted away since, I cannot be positive; but I judged it not material enough to be regarded in the scheme: for, in the main, I found the breadth of the side of the work, or solid, taken upon the ground-plot, is equal to half the longest diameter of the _area_, or a fourth of the whole longest diameter. Its perpendicular altitude, from the top of the terrace to the bottom of the _area_, is a fourth of the longest diameter of the _area_.