The "Great Pyramid" presents, moreover, many other marvels besides its size. First, there is the massiveness of the blocks of which it is composed. The basement stones are in many cases thirty feet long by five feet high, and four or five wide: they must contain from six hundred to seven hundred and fifty cubic feet each, and weigh from forty-six to fifty-seven tons. The granite blocks which roof over the upper sepulchral chamber are nearly nineteen feet long, by two broad and from three to four deep. The relieving stones above the same chamber, and those of the entrance passage, are almost equally massive. Generally the external blocks are of a size with which modern builders scarcely ever venture to deal, though the massiveness diminishes as the pyramid is ascended. The bulk of the interior is, however, of comparatively small stones; but even these are carefully hewn and squared, so as to fit together compactly.
Further, there are the passages, the long gallery, the ventilation shafts, and the sepulchral chambers all of them remarkable, and some of them simply astonishing. The "Great Pyramid" guards three chambers. One lies deep in the rock, about a hundred and twenty feet beneath the natural surface of the ground, and is placed almost directly below the apex of the structure. It measures forty-six feet by twenty-seven, and is eleven feet high. The access to it is by a long and narrow passage which commences in the north side of the pyramid, about seventy feet above the original base, and descends for forty yards through the masonry, and then for seventy more in the same line through the solid rock, when it changes its direction, becoming horizontal for nine yards, and so entering the chamber itself. The two other chambers are reached by an ascending passage, which branches off from the descending one at the distance of about thirty yards from the entrance, and mounts up through the heart of the pyramid for rather more than forty yards, when it divides into two. A low horizontal gallery, a hundred and ten feet long, leads to a chamber which has been called "the Queen's"—a room about nineteen feet long by seventeen broad, roofed in with sloping blocks, and having a height of twenty feet in the centre. Another longer and much loftier gallery continues on for a hundred and fifty feet in the line of the ascending passage, and is then connected by a short horizontal passage with the upper-most or "King's Chamber." Here was found a sarcophagus believed to be that of King Khufu, since the name of Khufu was scrawled in more than one place on the chamber walls.
The construction of this chamber—the very kernel of the whole building—is exceedingly remarkable. It is a room of thirty-four feet in length, with a width of seventeen feet, and a height of nineteen, composed wholly of granite blocks of great size, beautifully polished, and fitted together with great care. The construction of the roof is particularly admirable. First, the chamber is covered in with nine huge blocks, each nearly nineteen feet long and four feet wide, which are laid side by side upon the walls so as to form a complete ceiling. Then above these blocks is a low chamber similarly covered in, and this is repeated four times; after which there is a fifth opening, triangular, and roofed in by a set of huge sloping blocks, which meet at the apex and support each other. The object is to relieve the chamber from any superincumbent weight, and prevent it from being crushed in by the mass of material above it; and this object has been so completely attained that still, at the expiration of above forty centuries, the entire chamber, with its elaborate roof, remains intact, without crack or settlement of any kind.
Further, from the great chamber are carried two ventilation-shafts, or air-passages, northwards and southwards, which open on the outer surface of the pyramid, and are respectively two hundred and thirty-three and one hundred and ninety-four feet long. These passages are square, or nearly so, and have a diameter varying between six and nine inches. They give a continual supply of pure air to the chamber, and keep it dry at all seasons.
The Great Gallery is also of curious construction. Extending for a distance of one hundred and fifty feet, and rising at an angle of 26° 18', it has a width of five feet at the base and a height of above thirty feet. The side walls are formed of seven layers of stone, each projecting a few inches over that below it. The gallery thus gradually contracts towards the top, which has a width of four feet only, and is covered in with stones that reach across it, and rest on the walls at either side. The exact object of so lofty a gallery has not been ascertained; but it must have helped to keep the air of the interior pure and sweet, by increasing the space through which it had to circulate.
The "Pyramid Builders," or kings who constructed the three monuments that have now been described, were, according to a unanimous tradition, three consecutive monarchs, whose native names are read as Khufu, Shafra, and Menkaura. These kings belonged to Manetho's fourth dynasty; and Khufu, the first of the three, seems to have been the immediate successor of Sneferu. Theorists have delighted to indulge in speculations as to the objects which the builders had in view when they raised such magnificent constructions. One holds that the Great Pyramid, at any rate, was built to embody cosmic discoveries, as the exact length of the earth's diameter and circumference, the length of an arc of the meridian, and the true unit of measure. Another believes the great work of Khufu to have been an observatory, and the ventilating passages to have been designed for "telescopes," through which observations were to be made upon the sun and stars; but it has not yet been shown that there is any valid foundation for these fancies, which have been spun with much art out of the delicate fabric of their propounders' brains. The one hard fact which rests upon abundant evidence is this—the pyramids were built for tombs, to contain the mummies of deceased Egyptians. The chambers in their interiors, at the time of their discovery, held within them sarcophagi, and in one instance the sarcophagus had within it a coffin. The coffin had an inscription upon it, which showed that it had once contained the body of a king. If anything more is necessary, we may add that every pyramid in Egypt—and there are, as he have said, more than sixty of them—was built for the same purpose, and that they all occupy sites in the great necropolis, or burial-ground opposite Memphis, where the inhabitants are known to have laid their dead.
The marvel is, how Khufu came suddenly to have so magnificent a thought as that of constructing an edifice double the height of any previously existing, covering five times the area, and containing ten times the mass. Architecture does not generally proceed by "leaps and bounds;" but here was a case of a sudden extraordinary advance, such as we shall find it difficult to parallel elsewhere. An attempt has been made to solve the mystery by the supposition that all pyramids were gradual accretions, and that their size marks simply the length of a king's reign, each monarch making his sepulchral chamber, with a small pyramid above it, in his first year, and as his reign went on, adding each year an outer coating; so that the number of these coatings tells the length of his reign, as the age of a tree is known from the number of its annual rings. In this case there would have been nothing ideally great in the conception of Khufu—he would simply have happened to erect the biggest pyramid because he happened to have the longest reign; but, except in the case of the "Third Pyramid," there is a unity of design in the structures which implies that the architect had conceived the whole structure in his mind from the first. The lengths of the several parts are proportioned one to another. In the "Great Pyramid," the main chamber would not have needed the five relieving chambers above it unless it was known that it would have to be pressed down by a superincumbent mass, such as actually lies upon it. Moreover, how is it possible to conceive that in the later years of a decrepid monarch, the whole of an enormous pyramid could be coated over with huge blocks—and the blocks are largest at the external surface—the work requiring to be pushed each year with more vigour, as becoming each year greater and more difficult? Again, what shall we say of the external finish? Each pyramid was finally smoothed down to a uniform sloping surface.