[Illustration: FIG. 157.--SÂMARRÂ, BEIT EL KHALÎFAH, FRAGMENT OF RINCEAUX WORKED IN MARBLE.] [Illustration: FIG. 158.--SÂMARRÂ, BEIT EL KHALÎFAH, STUCCO DECORATION.] [Illustration: FIG. 155.--BEIT EL KHALÎFAH, FRAGMENT OF STUCCO DECORATION ON ARCH.] Mesopotamian system, without centering and with a small corbelling forward from the wall. Under this outset there are a series of square holes as if for beams, though it is scarcely conceivable that beams can have been laid across the halls at this point. Round wooden poles were certainly used in the body of the walls; the wood has perished leaving the round hole which it occupied. The windows (or doors?) of the chambers on either side of the triple hall were covered without lintel or arch in the manner already described. The decoration of the palace must have been mainly of stucco, worked in relief or frescoed. Lying upon the ground were small fragments of plaster bearing a frescoed pattern of a simple kind, a row of circles outlined in red and yellow; a small piece of moulded stucco is still attached to the inside of the arch over the opening of the central chamber (Fig. 155) and I picked up other pieces (Fig. 158). While I was at work a peasant came to me and inquired whether I would like to see a picture which he had just unearthed. I went with him to a trench close at hand, where he had been digging for bricks, and found a beautiful piece of plaster work adhering to a wall (Fig. 156). It was doomed to instant destruction that the bricks behind it might be removed. I inquired whether such decorations were frequently discovered, and promised a reward for any piece that was brought to me, with the result that before I left I had been provided with four other examples. Three showed variants of a continuous pattern (Figs. 159 and 160), while the third was worked with a fret motive (Fig. 161). To the east of the triple hall there are some underground chambers hollowed out of the rock. They have been explained in various manners and fully described by Viollet. Here as elsewhere in Sâmarrâ the rock begins immediately below the surface of the ground. It is a conglomerate of pebbles in a bed of lime, exceedingly hard to work and covered with so thin a layer of earth that no cultivation is possible. The cornfields and vineyards of the Abbâsid Sâmarrâ lay on the opposite bank of the Tigris in the low alluvial soil beneath the ridge on which stand Ḥuweiṣilât, the ’Ashiḳ and Ṣlebîyeh. Near the underground chambers of the Beit el Khalîfah there are considerable mounds, and in some places fragments of building which appertained to the palace. The walls are of sun-dried brick and the rooms have been covered with domes and semi-domes resting on squinch arches. [Illustration: FIG. 159.--STUCCO DECORATIONS, SÂMARRÂ.]