[Illustration: The soul, in the form of a human-headed bird, descending the pit of the tomb to visit the mummy in the mummy chamber.] The interior of the complete maṣṭaba consists of: 1. A chamber. 2. The Serdâb. 3. A pit. 4. A mummy-chamber. The walls of the =maṣṭaba chamber= may be ornamented with sculptures or not. In it, facing the east, is a false door, which is usually inscribed. At the foot of the false door, on the bare ground, is often seen a =tablet for offerings=, made of granite, alabaster, limestone, etc., on which are sculptured figures of meat and drink offerings—cakes, loaves of bread, geese, a haunch of beef, vases of unguents, fruit, vegetables, flowers, etc. In many tablets for offerings small tanks, or hollows, with channels, are cut, and in these libations of wine were supposed to be poured. A large collection of such tablets for offerings of all periods, from the IVth dynasty to the Roman Period, is exhibited in the Egyptian Gallery, Bays 14 and 16. Sometimes a pair of stands for offerings, made of stone, is found by the stele; examples of these are exhibited in Wall-case No. 200, in the Fourth Egyptian Room. In the south or north wall of the maṣṭaba chamber is usually a narrow chamber built of large stones, partly hidden in the masonry, to which the name of =Serdâb=[25] has been given. Sometimes the serdâb is isolated from the chamber, but usually it is connected with it by means of a rectangular passage, or slit, so narrow that the hand can be inserted in it with difficulty. Inside the serdâb the statue of the deceased, which was intended to serve as a dwelling-place for the Ka, or double, was placed, and the passage was made in order to conduct to it the smoke and smell of the burning incense and offerings. The serdâb is sometimes called the “Ka-chapel,” and persons of means and position generally appointed a “priest of the Ka” to offer up offerings morning and evening. The =pit=, or =shaft=, of the maṣṭaba was rectangular, square, or oblong, but never round, and it varied in depth from 40 to 80 feet. It led to the chamber below the ground where the mummy was laid. At the bottom of the pit, on the south side, was an opening into a passage from 4 to 5 feet high; this passage led obliquely to the south-east, in the same direction as the upper chamber, and then expanded on all sides and became the sarcophagus chamber, or =mummy chamber=. When the dried or mummified body had been placed in the sarcophagus, and the cover of the sarcophagus had been sealed, the pit was filled with stones, mud, and sand, and the deceased was thus preserved from all ordinary chances of disturbance.