No difficulty will be found in following on the plan the arrangement of the upper floors in the northern part of the palace. In the second storey, the space marked B^{2} is occupied by the vault of the great hall B (Fig. 81). At A^{2} three windows open into the hall from the room in the second storey. R^{2} and S^{2} correspond with the two courts R and S. In the third storey the rectangular space A^{3} is unroofed, and the space B^{3}, below which lies the vault of the great hall, is also unroofed (Fig. 82). The eastern part of this storey is completely ruined, but there would appear to have been rooms [Illustration: FIG. 100.--UKHEIḌIR, NORTH SIDE OF COURT M.] [Illustration: FIG. 101.--UKHEIḌIR, SOUTH-EAST ANGLE OF COURT S.] [Illustration: FIG. 102.--UKHEIḌIR, WEST SIDE OF B^{3}.] [Illustration: FIG. 103.--UKHEIḌIR, DOOR LEADING FROM V TO W, SEEN FROM SOUTH.] round R^{3} similar to the rooms round R^{2}. The _chemin de ronde_, T T´, is on a level with this storey. Between the main palace block and the eastern fortification wall there lies a group of rooms which is clearly an addition to the original scheme. It is interesting to observe that these rooms are in all essentials of their plan a repetition of the group of rooms to the south of court D. Room U corresponds with the antechamber E; room V with the square room F; W with the cloister J; X, Y, and Z to G, H, and T. But the columns in I I´ are not repeated in the small rooms, Z Z´; room V is covered with a groined vault instead of the barrel vault of F, and the court A is not closed with a wall like the court K. I make no doubt that both these groups of rooms, which are so strikingly similar in arrangement, were intended for the same purposes, and I conjecture that they were ceremonial reception rooms. Herzfeld has compared E and F with the throne room of Mshatta (_Der Islâm_, loc. cit.).