The Antechamber


Section 5.9.1

The next section consists of a horizontal passageway from the topstone in the Grand Gallery to the so-called King´s chamber, but in the middle of the passageway, there is an Antechamber with a peculiar locking system which should prevent intruders from entering the King´s chamber. It is obvious that the locking system did not keep out the intruders - whoever they were - and this passageway has been unbearable vandalized. 

Even the doorway in the southern wall of the Grand Gallery is vandalized. Hereunder are photos of the doorway taken by Edgar.

Source: The Great Pyramid Passages And Chambers" Volume 1 by John and Morton Edgar, 1910

Source: The Great Pyramid Passages And Chambers" Volume 1 by John and Morton Edgar, 1910

I have marked a track above the doorway. It appears that intruders have used a long tool. Why was it necessary?  

Maybe because there was a block stone in the doorway hiding the passageway that needed to be removed?

Source: The Great Pyramid Passages And Chambers" Volume 1 by John and Morton Edgar, 1910, revised with a blue marking by me.


Section 5.9.2

The height and width of the doorway between the Grand Gallery and the horizontal passageway to the Antechamber is not mentioned by Petrie, so I must see what Smyth has measured, even his measures usually are bit shorter: 

Source :  (S20-P94-L5-8)

My comments:
The northern doorway near the great step in the Grand Gallery:
Height: 43,7" = 2,12 cubits RM, which is rounded up to 2,1 cubits RM in the drawings.
Width: 41,5" = 2,01 cubits RM,  which is rounded up to 2,0 cubits RM in the drawings.

The southern doorway near the King´s chamber:
Height: 43,6" to 43,8" = 2,11 cubits RM to  2,12 cubits RM,  which is rounded up to 2,1 cubits RM in the drawings.
Width: 41,4" = 2,01 cubits RM, which is rounded up to 2,0 cubits RM in the drawings. 

It seems the northern doorway is located exactly in the middle of the southern wall of the Grand Gallery on the great step.
According to section 5.5.10 the width between the walls in the Grand Gallery is 3,98 cubits RM, so the walls east and west for the doorway has a width of:
( 3,98 cubits RM - 2,01 cubits RM ) / 2 = 0,99 cubits, which is rounded up to 1,0 cubits in the drawings.

According to section 5.5.10 the coordinates of the southern corners in the Grand Gallery is:
East - south corner: 2041;2170
West - south corner: 2081;2170

According to section 5.5.9 the up-down coordinate at the above mentioned corners is: 1979 

Section 5.9.3

I have try make a drawing of the original northern doorway at the top stone and added the measures:

Underneath the same drawing but with coordinates instead. Please observe in this drawing have coordinates composed of all three dimensions:

The coordinates are composed of: North-South; Up-Down; East-West.

Calculations:
Eastern corner: 2170;1979;2041

2170;1979;(2041+1 cubit x 10) = 2170;1979;2051
2170;1979;(2041+2 cubits x 10) = 2170;1979;2071
2170;1979;(2071+1 cubits x 10) = 2170;1979;2081

2170;(1979 - 2,1 cubits x 10);2051 = 2170;1958;2051
2170;(1979 - 2,1 cubits x 10);2071 = 2170;1958;2071

Section 5.9.4

The complete section of the horizontal passageways and the Antechamber was measured by Petrie, here are the results:

Source: (S5orig-[S47]-P75-table)

Source: (S5orig-[S47]-P76-table), it is a continuation of the table on page 75.

The tables are mixed together in an Excel sheet:

The measures are in British inches.

The next table is the same, but in cubits. The calculation is inches/20,62 = cubits: