(_b_) The courses of the blocks at the necessary height above the floor of the entrances on either side do not always correspond. (_c_) The top courses near the summit of the walls on either side of the entrances show distinct signs of curving inwards towards the entrances. This is particularly noticed on the east side of the north-west entrance to the Elliptical Temple. (_d_) No splinters of slate or granite beams which could have been used as roofing were found in any of the very many rounded entrances. (_e_) Two intact rounded entrances, one open up to the summit on either side to a height of 19 ft., one entrance being at the east end of Pattern Passage on the Acropolis. No main entrance has buttresses on either hand on the outer side, possibly because these would have provided any attacking party with excellent shelter. All buttresses of such entrances are on the inside. Divisional entrances which have buttresses have them on the inside only. The entrances through a wall of the earlier period are carried over the common foundation in the opening forming the steps, which were evidently constructed before the side walls were erected. These steps are large, broad, and high, and where intact look most imposing. Such entrances resemble stiles, as they are much higher than the levels of the floors on either side. The entrances through an angular wall of a later period have steps which are not part of either side walls, but were built in after the entrance passage had been constructed, and these show poor workmanship and are very shallow, and recede only two to four inches. As the levels of the enclosures on either side have filled in over the original floors, such “cat-steps” have in some instances been built over the original large steps for the purpose of raising the floor of the entrances, seeing that the enclosures on either side had been filled in some feet above their original levels. Directly opposite the main entrance of the “Outspan Ruins” is a large circular buttress, as if it were intended to divide any attacking party into small numbers. • • • • • _Cause of dilapidation to entrance buttresses._—The entrance buttresses with portcullis grooves are in most instances comparatively small, some projecting only two to three feet towards the interior of the building, and these are built up against main and divisional walls, and are in point of construction altogether independent erections, there being no dovetailing or binding between the buttresses and the walls.