The limestone school was expressly that of Memphis and Middle Egypt. It is best known from the host of private statues found in the cemetery of Saqqareh. Work of the finest delicacy was done in this soft and uniform material (see figs. 24, 29-32); and a branch of the same school was that working the harder limestones which were a favourite stone in the XVIIIth and XIXth dynasties in upper Egypt, as in the colossus of Rameses II (fig. 12). Both branches of this school excelled in the delicate expression of physiognomy; the proportions of the limbs and the finish of the extremities are usually excellent. The alabaster work is a branch of this same school, with similar proportion and finish. It is a rare material for sculpture till the XVIIIth dynasty, but under Amenhotep II to IV it was often used; and it serves for one of the best works of later time, the statue of Amenardys (fig. 47). The quarries were in the midst of the limestone hills, especially where the hard limestone occurs near Tell-el-Amarna. Thus the same school dealt with this whole group of calcareous rocks. Another very fine school was that of the quartzite sandstone of Gebel Ahmar, near Cairo. The material was closely limited to a single hill cemented by hot springs; and what is now seen there is only the immense heap of chippings left by workers of all ages: the hill itself has almost vanished. This material was worked in the pyramid times, but only roughly. The XIIth dynasty kings saw its value, and quarried it for sarcophagi and chambers, but seldom used it for sculpture. The XVIIIth dynasty attacked it on an enormous scale; the two great colossi of Amenhotep III, weighing 1175 tons each, were cut and carried up-stream 450 miles to Thebes. Statues are found, royal and private, in all parts of the land, and naturally this stone was largely used at Tanis. The work is usually excellent, almost equal to the limestone sculpture; but it generally falls a little below that of the previous schools in the depth of cutting and the freedom of work in hollows. The red granite school was at Aswan, where the statues and obelisks are still lying unfinished in the quarries. The artist was much hindered by the coarse grain of the stone, which made fine work difficult. On the obelisks this has been fairly overcome by a great amount of emery cutting, and sharp smooth hieroglyphs were cleanly cut. But for statuary, even in the pyramid age the features are coarsely worked and the detail scanty; and when used later on a large scale, the forms are heavy, the inner angles seldom worked out, and the extremities thick and massive. This is seen in the colossus of Rameses II (fig. 13), as well as in earlier figures.