somewhat, but the above are very nearly correct.  The area of the base is 64,753 square yards, or about 13-1/3 acres.  The surface of each face, not including the base, is 25,493 square yards; and that of the four faces is consequently 101,972 square yards, or more than 21 acres.  The solid contents of the pyramid, without making deductions for the small interior chambers, is 3,394,307 cubic yards.  Reckoning the total height at 479 feet, the pyramid would be 15 feet higher than St. Peter’s at Rome, and 119 higher than St. Paul’s, London.  The entrance to the great pyramid is on the north face, 471/2 feet above the base, and on the level of the fifteenth step from the foundation.  The entrance is easily reached by the mass of rubbish which has fallen or been thrown down from the top.  The passage to which this opening leads is 3 feet 71/2 inches square, with a downward inclination of about 26 deg..  It is lined with slabs of limestone, accurately joined together.  This passage leads to another, which has an ascending inclination of 27 deg..  The descending passage is 73 feet long, to the place where it meets the ascending one, which is 109 feet long; at the top of this is a platform, where is the opening of a well or shaft, which goes down into the body of the pyramid, and the commencement of a horizontal gallery 127 feet long which leads to the Queen’s chamber, an apartment 17 feet long, 14 wide, and 12 high.  Another gallery, 132 feet long, 261/2 high, and 7 wide, commences also at this platform, and is continued in the same line as the former ascending passage, till it reaches a landing place, from which a short passage leads to a small chamber or vestibule, whence another short passage leads to the King’s chamber, which as well as the vestibule and intermediate passage, is lined with large blocks of granite, well worked.  The king’s chamber is 341/2 feet long, 17 wide, and 193/4 high.  The roof is formed of nine slabs of granite, reaching from side to side; the slabs are therefore more than 17 feet long by 3 feet 91/2 inches wide.  This chamber contains a sarcophagus of red granite; the cover is gone, having probably been broken and carried away.  The sarcophagus is 7 feet 61/2 inches long, 3 feet 3 inches wide, 3 feet 81/2 inches high on the outside, the bottom being 71/2 inches thick.  There are no hieroglyphics upon it.  Several other chambers have been discovered above the king’s chamber, but as they are not more than three or four feet high, they were probably intended to lessen and break the weight of the mass above, which would otherwise fall on the King’s chamber.

In 1816, Captain Caviglia discovered that the entrance passage did not terminate at the bottom of the ascending passage, but was continued downwards in the same inclined plane of 26 deg., 200 feet further, and by a short horizontal passage, opened on what appeared to be the bottom of the well.  The passage, however, continued in the same direction 23 feet farther; then became narrower, and was continued horizontally 28 feet more, where it opened into a large chamber cut out of the rock below and under the centre of the pyramid.  This chamber is about 26 by 27 feet.  Another passage leads from this chamber 55 feet, where it appears to terminate abruptly.