of masonry columns and vault form heaps of débris on all three sides of the court. At the eastern end of the ḥaram there is a low door, almost blocked by ruin heaps, which gives access to a narrow blind passage situated under the stair. The vault of the ḥaram has received an elaborate decoration in stucco. It was divided into sections by nine transverse arches, 1 metre wide. They cannot have had any correspondence with the columns and arches of the arcade, nor was this necessary, for they sprang from above the line of the vault and therefore from above the summit of the arches of the arcade. The transverse arches were decorated with lozenges (wards as they would be called in modern Arabic) having a zigzag outline (Plate 18, Fig. 1). In the centre of each lozenge there was a round hole, or rosette, recessed back in concentric circles. Between the transverse arches the vault was worked in parallel bars of stucco, the one oversailing the other. The bars begin at a distance of about ·80 metre above the spring of the vault. It is evident that this vault must have been constructed over a light centering, and Dr. Reuther is of opinion that the singular ridged decoration was suggested by the impression left by the centering boards upon the plaster.[23] The top of the vault was probably treated as in room 31, where a decoration similar to that of the ḥaram is more fully preserved. Holes for cross-beams break the fourth and fifth stucco ridge between each transverse arch. Between the terminal transverse arches and the wall at either end of the ḥaram there is a space 1·60 metres long. It is divided into two quarter-domes by a transverse arch which springs from the back wall, at right angles to the transverse arches of the vault. This arch is decorated in exactly the same manner as the others and must have joined the first transverse arch at either end, at the summit of the vault. The quarter-domes are covered with stucco ornament. At the east end (Plate 20, Fig. 1) a fluted squinch occupies the two angles; on either side of it are two shallow calottes. Three concentrically recessed rosettes are set above each of the calottes, and there is a like motive in the apex of the calotte. Above the squinch and calottes there is a band of four isolated crenellations, the same motive which appears on the archivolt over the doors of corridors 5 and 6. Above the crenellations are vestiges of a decorated band, and above the band the apex of the quarter-dome is fluted. At the west end there is a slight variation in the proportions and in the motives of the lower register of the quarter-domes (Plate 20, Fig. 2). The squinch, instead of being fluted, is decorated with three concentric bands, sunk one within the other. At its base lies one of the usual concentric rosettes. The same rosette is placed on either side of each calotte and within the calotte, the rosette above the calotte being omitted. The crenellated motive of