The Hawara Pyramid, on the north of the Labyrinth, and erected by the same King Amenemhat III., has been examined by Mr. Petrie and described by him.[48] As the rock on which it was built was little more than hardened sand, a pit was excavated, into which a monolithic chamber of granite, brought from Upper Egypt, and weighing 100 tons, was lowered. The sarcophagus and two other coffins having been placed in it, the chamber was covered over with three granite beams, 4 feet thick, one of which was raised in a hollow chamber, and supported there till after the King’s death and the deposit of his body in the sarcophagus. Round the granite monolith were built walls which carried two courses of stone blocks, the lower horizontal, the upper courses sloping one against the other, as in the Great Pyramid. The rest of the pyramid was constructed in brick, and to prevent the brickwork settling down and splitting on the pointed roof-stones, an arch of five courses of brick, measuring 3 feet deep, was thrown across, resting on bricks laid in mud between the arch and the stonework. The brickwork above the arch was laid in sand, and the whole pyramid covered with a casing of limestone. The size of the pyramid Mr. Petrie calculates to have been about 334 ft. wide and 191 ft. high. A second pyramid belonging to this dynasty, and erected by Osirtasen II., has also been examined and described by Mr. Petrie.[49] This pyramid (Illahun) is of peculiar construction, being partly composed of the natural rock dressed into form to a height of 40 feet, above which rose the built portion, which was different from that of any other pyramid, being built with a framing of cross walls. The walls ran right through the diagonals up to the top of the building, and had offset walls at right angles to the sides, the walls being of stone in the lower part, and brick above; the filling-in between the walls was of mud and brick, and the whole pyramid, brick, stone, and rock, was covered with a casing of limestone. AN EGYPTIAN TOWN. [Illustration: 14. Plans of Houses, Kahun.]