the southern end, through a narrow vaulted way, on to the roof of No. 47. The outer stair from the yard is a later addition (Plate 40, Fig. 1). The round tower at the northern end of the wall has been cut away to receive it, and it was supported further by four rectangular piers, two on either side of the tower, which were built up against the wall. These piers were not bonded into the wall, and the northernmost has entirely fallen away, but it can still be traced on the face of the masonry. The communication with the first floor was effected, as has been mentioned, by means of a door at the north-east angle of the ramp. Room 106 occupies the vaulted space at the west end of 47 and has a door to the south opening on to the roof of 45. To the west a door leads into corridor 102, which lies above the eastern wing of corridor 28 (Plate 22, Fig. 2). It has a door to the south opening on to the roof, and is lighted by narrow windows in the south wall. West of 102 was the small room, 101, now ruined, and beyond it rooms 100 and 99 above the west wing of corridor 28. The height of these rooms on the first floor is only 3·55 metres to the top of the vault. No. 100 communicates by a door and steps with the stair leading up from the south-west corner of the great hall, and so with the first floor chambers of the west wing. These can be approached also from the west door of room 89, which opens into the passage room No. 92. In the south wall of 92 there is first a door and steps which lead down to No. 96, secondly a door giving access to the roof of the east riwâq of the mosque, and further west a narrow window which overlooks the ṣaḥn. There are two similar windows in the south wall of 91 and a door on to the roof of the west riwâq of the mosque. (The windows and the door of the west riwâq can be seen in Plate 23, Fig. 1.) At the western end of 91 a window opens on to the palace yard. Rooms 96, 97, and 98 lie above 8, 9, and 10. They are lighted by narrow windows in the west wall, which can be seen in Plate 19, Fig. 1. They communicate with each other by doors covered by ovoid arches set back from the jambs and breaking into the curve of the vault, and each has access through an arched opening in the east wall to a small room ·85 metre wide, lying at a higher level. The northernmost of these three small rooms lies under the stair leading from No. 89 to the second floor, and its vault slopes down at the northern end in order to leave space for the stair. No. 98 opens by a door on to the staircase from the great hall. At the west end of the staircase there is a door leading out on to the roof of the ḥaram, and above it is placed a window. Both door and window can be seen in Plate 19, Fig. 1. Opposite to this door and window there is a large opening in the west wall of the great hall, doubtless in order to secure a little additional light in that dark edifice.