In court E the arrangement of the rooms is modified owing to the exiguous space which remained at the back of the ceremonial chambers. The elements are, however, the same, a court, a lîwân with side chambers, and a kitchen. To these are added a stair leading to the roof, which is absent from the ḥaram courts. It is reasonable to assume that court E was the private bait of the lord of Ukhaiḍir. These courts or baits are foreshadowed in the posterior courts of the Achaemenid and the early Sasanian palaces (again Firûzâbâd offers the closest parallel); in the palace of Khusrau they reach a development which was to be very little modified at Ukhaiḍir. The scheme can best be studied in the courts on the lower level O, Q, and S. Each of these courts is provided on the west side with a lîwân, flanking chambers, and a ṭarmah, while a fourth chamber to the north may be a kitchen. To the south a vaulted passage leads in each case to a posterior court P, R, and T. On the eastern side of the forecourts there is another lîwân group, much shallower than the first and without a ṭarmah or any subsidiary rooms. The flanking chambers of the eastern lîwâns have small doors into the court and into the vaulted passage behind them. As far as I could judge, the three forecourts communicated with each other, in which case the strict isolation of the baits of Ukhaiḍir is a new feature. In courts K and M the arrangement is a little different. The east end in one court only is occupied by a shallow lîwân group, the west end in both by a deep lîwân group with a ṭarmah, but the subsidiary chambers are to the rear, one small and one larger room, approached by a door through the lîwân and opening on to a posterior court. The four baits on the upper level are very similar. The subsidiary chambers are placed behind the main lîwân; in courts C and G there is a group of rooms to the side, and court G is without the shallow eastern lîwân group in its forecourt, but possesses it on the west side of its posterior court. Neither courts E nor I have the small lîwâns. All the courts communicate with one another (except perhaps courts I and H) and with the passage. These long vaulted passages are a feature of Ukhaiḍir also. The building materials at Qaṣr-i-Shîrîn are those of Ukhaiḍir and Sarvistân, undressed stones, coursed with a certain amount of care, and burnt brick tiles for the finer work.