APPENDIX.
07
The original perpendicular height, if the casing had heen com-
pleted, would have been 335 feet 9 inches.
Angle of the casing of the lower portion - 54° 14' 46"
upper portion - 42° 59' 26"
The platform at top is about 40 feet scpjare.
Mr. Pcrring began to clear the passages on September 20th.
There are two, and both of them are inclined. The one, which
is open, is in the centre of the northern front, twelve courses
above the present level of the ground, and 34 feet 10 inches per-
pendicularly higher than the base: it is difficult of access. The
other is 44 feet 4 inches to the southward of the centre of the
western front, and at a perpendicular height of 97 feet 8 inches
above the base. It was discovered by Mr. Perring in October
1839, but it has not been opened. The first part of the northern
passage, in length 41 feet 2 inches, at present descends at an
angle of 28° 38' on account of a settlement (shewn at A in the
Section); but the original inclination was that of the remainder
of the passage (26° 10'). Immediately at the entrance, the
removal of the floor has increased the height of it to 5 feet
10 inches, but it is afterwards only 3 feet 5^ inches; the width
is the same, and the total length is 256 feet 11 inches.
The Pyramid was entered in 1GG0, by Mr. Melton, an English
traveller; and in 1680 by M. Le Brun, when a small apartment
was discovered. It had also been visited by Mr. Pocock. It
was examined by Mr. Davison, in 1763, by whom the passage
was found to be blocked up. When Mr. Perring commenced his
operations, it was only accessible to the length of 140 feet, and
it had evidently been closed up intentionally, because stones
detached from the upper part would have rolled over the mouth
of the entrance; and because it was full of large stones, like
those which are to be found in the adjacent desert. The removal
of these obstructions has been said to have commenced on Sep-
tember 20th ; but it could only be continued at intervals in conse-
quence of the want of air, which on the 15th of October had
nearly occasioned the work to be abandoned, when a rush of
fresh air down the passage, consequent upon an opening being
effected into the interior apartments, enabled the men to proceed,
and in a few minutes to complete the operation.7 The lower end
7 Mr. Perring states that this current of air continued for two days, so
that the lights could with difficulty be kept in. It would therefore appear
that the apartments must have had some other communication with the out-
ward air.
07
The original perpendicular height, if the casing had heen com-
pleted, would have been 335 feet 9 inches.
Angle of the casing of the lower portion - 54° 14' 46"
upper portion - 42° 59' 26"
The platform at top is about 40 feet scpjare.
Mr. Pcrring began to clear the passages on September 20th.
There are two, and both of them are inclined. The one, which
is open, is in the centre of the northern front, twelve courses
above the present level of the ground, and 34 feet 10 inches per-
pendicularly higher than the base: it is difficult of access. The
other is 44 feet 4 inches to the southward of the centre of the
western front, and at a perpendicular height of 97 feet 8 inches
above the base. It was discovered by Mr. Perring in October
1839, but it has not been opened. The first part of the northern
passage, in length 41 feet 2 inches, at present descends at an
angle of 28° 38' on account of a settlement (shewn at A in the
Section); but the original inclination was that of the remainder
of the passage (26° 10'). Immediately at the entrance, the
removal of the floor has increased the height of it to 5 feet
10 inches, but it is afterwards only 3 feet 5^ inches; the width
is the same, and the total length is 256 feet 11 inches.
The Pyramid was entered in 1GG0, by Mr. Melton, an English
traveller; and in 1680 by M. Le Brun, when a small apartment
was discovered. It had also been visited by Mr. Pocock. It
was examined by Mr. Davison, in 1763, by whom the passage
was found to be blocked up. When Mr. Perring commenced his
operations, it was only accessible to the length of 140 feet, and
it had evidently been closed up intentionally, because stones
detached from the upper part would have rolled over the mouth
of the entrance; and because it was full of large stones, like
those which are to be found in the adjacent desert. The removal
of these obstructions has been said to have commenced on Sep-
tember 20th ; but it could only be continued at intervals in conse-
quence of the want of air, which on the 15th of October had
nearly occasioned the work to be abandoned, when a rush of
fresh air down the passage, consequent upon an opening being
effected into the interior apartments, enabled the men to proceed,
and in a few minutes to complete the operation.7 The lower end
7 Mr. Perring states that this current of air continued for two days, so
that the lights could with difficulty be kept in. It would therefore appear
that the apartments must have had some other communication with the out-
ward air.