The ceilings of the rooms were formed with rafters of the date tree with transverse layers of palm branches or planks and sometimes they were vaulted and made of brick and in the houses of the rulers they might have been arched with stone. The floors were of stone or a composition made of lime and other materials. The doors opened inward, both of the rooms and the outside entrance. The doors were made of wood, often stained to imitate foreign and rare wood. They were made of one or two valves and they turned on pins of bronze, which were fastened to the wood with nails of the same metal, and they were secured within by means of a bar or bolt or with a wooden lock. The openings for the windows were small as the cloudless sky of Egypt gave out brilliant light and small openings let in less heat. The windows had wooden shutters of one or two valves, opening on pins and secured by bars and bolts, as the doors. The walls and ceilings were stuccoed and ornamented with various devices painted on them, being tastefully done in form and arrangement of colors. A terrace was placed on top of the house and covered with a roof and supported by columns, which during the summer provided a refuge from the heat of the day and a sleeping-place at night. Beside these town places there were villas, which sometimes were quite great in extent with a large mansion and beautiful gardens, watered by canals from the Nile, and all surrounded by a wall. The poorer classes of people sat cross-legged, crouched on the ground, knelt on one or both knees, or sat on the heels. Sometimes as a token of respect to superiors, the people of the higher classes knelt or sat on the heels, but usually they used chairs or stools or couches. The chairs were of various kinds, some of them of elegant form and made of ebony and other fine woods, inlaid with ivory, and covered with rich stuffs. Beside the single chair, they had a double chair for two persons, which often was reserved for the master and mistress of the house, and occasionally offered to guests. Most of the chairs had backs, some had a raised piece at the back, while others were made in the form of camp-stools. They were usually about as high as they are now, but some of the chairs were quite low, the seat sometimes being as low as eight inches from the floor. The legs were usually made in imitation of those of an animal, as, of the lighter chairs like the legs of an antelope, of the heavier like those of a lion. In the finer chairs bars were not used to unite the legs. The seats were made of wood or leather and sometimes of interlaced string or leather thongs, over which a cushion was placed.