To return to court B. The passage already mentioned, running parallel with the outer wall, leads into an oblong room, 47, 3·55 metres wide, which lies from east to west across the back of the lîwân group and the stair. This room is vaulted at either end but is left open near the centre (Plate 35, Fig. 3). The same oblong room is found behind the southern lîwân group of court B, and behind each of the lîwân groups in courts C, G, and H. In every case the vault next to the outer wall is pierced by a pair of terra-cotta pipes similar to the pipes described in No. 37. It is probable, as I shall show later (p. 82) that these rooms were intended for kitchens. On the south side of court B there is no stair; above the vault of the passage which leads into the oblong room, 51, there is a blind corridor accessible from No. 50 by a door placed in the east wall, some 2 metres from the ground. This door must have been approached by a wooden ladder or steps, but I climbed up into it over a heap of ruins. On the west side the antechamber of No. 49 is provided with a door into corridor 28. Immediately to the south of this door a wall, broken by a doorway, has been built across the corridor. This wall is a later addition; it is not bonded into the walls of the corridor, and it does not occur in the corresponding west arm. Court C differs from court B in the absence of antechambers to the lîwân groups (Plate 33, Figs. 3 and 4). The lîwân opens into the court through a wide pointed arch carried on engaged columns; the side chambers are provided with doorways into the court, covered by ovoid arches set back from the jambs (Plate 36, Fig. 2), and the façade thus formed corresponds exactly with the façades of the court on the top floor of the three-storied block. Near the south-east corner of court C there is an arched doorway leading into the palace yard (Plate 37, Fig. 1). In the oblong chamber, 60, behind the southern lîwân group, the south wall is occupied by a blind arcade of four arches borne by piers 1·10 metres wide and 1·05 metres deep. A similar blind arcade occurs in the corresponding chamber of court G, and indeed, except for slight variations in the measurements, the only difference between courts C and G is that in the latter there is no door into the palace yard. In the same way court H re-echoes court B save that in court H there is no doorway between the southern antechamber, 82, and the corridor 28 (Plate 37, Fig. 3).