Fig. 152.—Transverse section, in perspective,
through the sarcophagus-chamber and the discharging chambers;
from the elevation of Perring.

As the structure grew above the roof of the mummy-chamber, five small chambers were left, one above the other, to a total height of 56 feet, which would relieve the flat ceiling of the mummy-chamber of the weight to be placed above it. The first four of these chambers were of similar shape and had flat roofs, but the roof of the fifth was formed of sloping slabs, meeting in a ridge, and giving the chamber a triangular section (see [Fig. 152]). Thanks to this succession of voids immediately over the main chamber, and to the pointed arch which surmounts them, the vertical pressure of the superstructure is discharged from the chamber itself and distributed over the lateral parts of the pyramid. These precautions have been quite effectual. Not a stone has been stirred either by the inward thrust or by the crushing of their substance; not a block is out of place but those which have been disturbed by the violence of man; and, moreover, the whole structure is so well bonded and so well balanced that even his violent attacks have led neither to disruption nor settlement in the apartment of Cheops or in the galleries which lead to it.[204]

Fig. 153.—Longitudinal section through the lower chambers;
perspective after Perring.

The glory of the workmen who built the Great Pyramid is the masonry of the Grand Gallery, the gallery which opens immediately into the vestibule of the King's Chamber. As this corridor is 28 feet high and 7 feet wide, the visitor can breathe more freely than in the low and narrow passages which lead to it, and can examine at his ease the beautiful blocks of limestone from Mokattam of which its polished walls are composed. The faces of these blocks have been dressed with a care which is not to be surpassed even by the most perfect examples of Hellenic architecture on the Acropolis at Athens. The internal faces must have been worked with equal care. No cement has been employed in the fixing, and the adherence is so perfect that, in the words of Abd-ul-Latif "not a needle, not even a hair, can be introduced into the joints."[205] These joints are not even to be distinguished without careful examination. The roof of this gallery is built with no less care.[206] Each of the upper courses is slightly set off from the one below it, so that in time they come so near together that the opening may be closed by a single stone, or rather, row of stones. These, being held between the two upper courses of a quasi vault, play the part of key stones. This method of vaulting has been employed in other parts of the pyramid, especially in what is called the Queen's Chamber, which is almost directly beneath the king's, or sarcophagus-chamber. The same care is conspicuous in those linings of red granite which form the walls of the two chambers. Even the fine limestone used for the walls of the Grand Gallery was not considered rich and solid enough for the walls of the apartment in which the prince in whose honour the whole of the colossal edifice was reared would repose; and it was determined to use the richest and most costly material of which the Egyptian architect could dispose.[207] The plain sarcophagus, without either inscription or ornament, which is still in the King's Chamber, is also of red granite.

The external casing of the pyramid has entirely disappeared, as we have already said. On account of their moderate size the stones of which it was composed would seem to be especially well fitted for use in building those great cities which, after the collapse of the ancient civilization, succeeded each other, under different names, in the neighbourhood of the Memphite necropolis. This casing seems to have been made of more than one kind of stone, if we may believe an ancient text which has been interpreted by Letronne with the skill and sagacity of which he has given so many proofs.[208]

The author, named Philo, of a treatise upon the Seven Wonders of the World, tells us that the Egyptians employed upon this work "the most brilliant and varied stones, which were carefully fixed." He mentions as contributing to the splendid result white marble, basalt, porphyry, and a green breccia from Arabia, which must have been what is called verde antique. And as for his white marble, it must have been the white limestone from Mokattam, which, in its best strata, is almost as white and fine in grain as marble. Marble, properly speaking, was only introduced into Egypt by the Greeks, and that in very small quantities, for the use of sculptors. Philo says nothing of granite, but its use was so general that it must have found a place in the scheme of decoration.[209]

The various kinds of stone must have been so placed as to form zones, and perhaps patterns, of different colours, white, red, black, rose, green, and so on. To form an idea of the effect we must think of Giotto's campanile at Florence and various other Italian buildings of the same kind.

It has been questioned whether the testimony of this Philo is to be depended upon, as few of those who have busied themselves with the pyramids seem to have laid much stress upon it. It seems to us to be worthy of great respect. We do not know when Philo lived, but we know that the casing of the pyramid was still in place, at least in part, during the Middle Ages, because in the time of Abd-ul-Latif it had almost its original height, and its ascent was still very difficult.[210] On the other hand we have proofs that, although the author of the Seven Wonders of the World may have written more in the tone of a rhetorician than of an eyewitness of the wonders which he describes, he took some of his information from excellent sources. In fact with the exception of Pliny, he is the only ancient writer who gives us an approximately true statement of the length of the base line of Cheops' Pyramid. While the measurements of other writers are very far from accurate, the figure given by Philo is only 16 feet 6 inches in excess of the truth. The idea of decorating such an expanse of surface with varied colour was quite in accordance with Egyptian taste. They loved polychromatic ornaments; they covered every available surface with the gayest hues; they delighted in the juxtaposition of the most brilliant tones. They could hardly think of covering such an immense surface with paint, and as it was necessary, in any case, to cover it with a smooth casing, it would be no more difficult to employ many kinds of stone than one. They would thus obtain a kind of gigantic mosaic which may perhaps have been heightened in effect by the use of gold. We know that the pyramidion of an obelisk was frequently gilded, and it is probable enough that similar means were sometimes taken, in the case of the more magnificent and carefully finished pyramids, to draw the eye to their topmost stone and thus to add to the impression made by their height. No more fitting adornment could be imagined for the sharp peak of a pyramid rising nearly five hundred feet into the pure blue of an Egyptian sky.