The rock face is crossed by three black lines, lettered a, b, and c, and one red line d. It will be seen that the structure of the face below the line c is similar to that of the side of the obelisk trench; the intervals, too, between the vertical markings are almost exactly the same, namely 29.8 cm. on the quarry-face against 29.9 on the trench.

It appears that, above the line c, the vertical markings made by the pounding have been hammered out to a certain extent, as if to use the upper half as a kind of blackboard.

There is no doubt that some monument has been removed from before this quarry-face, and it is rather tempting to see, in the lines a and c, the levels of the top and bottom faces of an obelisk, the line b being a centre line. If this is so, the taper is 1 in 17.5, which is sharper than the known large obelisks (see section [11]). Unfortunately, the method of detaching the monument, whatever it may have been, is no longer traceable, as a large stratum of granite has been removed, almost certainly by burning, perhaps to make a control platform, destroying all traces of the original bed of the monument.

Line c is very nearly level, and both b and c are divided into ‘feet’ by short vertical black lines each in the middle of the pounded grooves. The reason for this is not clear to me.

The red line d is separated from the black line c by one double obelisk-foot; that is the distances between the lines varies between 59.7 and 60 centimetres. The vertical red lines are not very accurately drawn, but the average distance between successive lines is equal to the double-foot. The horizontal red lines above line d convey no meaning to me, neither do the eyes or the nefer on lines b and c.

Down the centres of the red squares, above the line c, run a series of curious chains in red—now very faint—all of which cut the line d, and some the line c. The horizontal lines on these chains are nearly the same distance apart. Those above the line d are much more irregular, and look like two different measures superimposed, the lower series being similar to the chains between c and d; they are, however, so faint that it is only at e that the beginning of the joining of the horizontal members can be determined.

I have numbered the spaces between the vertical divisions I–XIII; below is a table giving the levels in metres of each horizontal line in every chain, taking the level of line d as unity. {18} I have not taken any measurement nearer than half a centimetre, as the lines are thicker in some places than that, and I cannot be sure of a greater accuracy owing to the faintness of the lines.

(17)

SPACE (Plate [VI]).
I.II.III.IV.V.VI.VII.VIII.IX.X.XI.XII.XIII.
Upper series″ .05 ″″″″″″ .02 .02 .05″″
″″″″″″″ .13 .12 .12 .15″ .12
″ .15 ″″ .17  .19″″″″″ .20 .21
″ .27 ″″″″″ .28 .27 .26 .30 .31 .30
″″″″ .30  .30″ .33 .37″ .35 .35 .36
″ .41  .44 ″ .48  .45″ .40 .44 .40 .42 .38″
″ .52 ″″″″″ .47 .50 .48 .50 .46″
″ .58  .55 ″″ .59″ .55 .56 .55 .58 .53″
″″″″ .62 ″″ .62″ .63″ .60″
″ .67  .655″″″″″″″″ .68″
″″″″″″″ .70 .72″″″″
″ .74 ″″ .73 ″″ .77 .74″″″″
″ .82 ″″″″″ .84″″″″″
″ .89 ″″″″″ .92″″″″″
Lower series″″″″″″″″″ .71(?)(?)(?)
″″″″ .78 (?)″″(?) .78(?)(?)(?)
″″″ .83 .84  .82″(?)(?) .85(?)(?) .81
 .88  .895 .83  .89 .91  .89″.91 .86 .92 .87 .89 .88
 .95 (?) .94  .95 .97  .95(?) .97(?) .99 .94 .96 .98
1.03 1.0451.02 1.011.03 1.001.031.031.021.041.001.031.03
1.09 1.10 1.09 1.071.10 1.071.111.081.081.111.071.111.10
1.15 1.16 1.13 1.151.17 1.141.181.151.151.171.141.171.17
1.22 1.22 1.2151.211.24 1.211.251.231.221.241.211.241.24
1.2751.29 1.28 1.281.30 1.281.321.301.291.311.281.321.31
1.35 1.37 1.35 1.351.3751.351.391.361.361.381.351.391.38
1.42 1.4251.42 1.421.45 1.421.471.441.431.45(?)1.461.47
1.49 1.50 1.4951.491.52 1.50(?)″″″″″″
1.57 1.57 1.5651.56″″″″″″″″″
1.64 1.6451.64 ″″″″″″″″″″
Sure intervals11111111111068811789
Total length
of intervals		.76 .75 .76 .73 .74 .68 .44 .53 .57 .74 .48 .57 .66 
Unit.069.068.069.066.067.068.073.066.071.067.069.071.073
Average unit for lower series .0690 m.

(18) It is noteworthy, in the lower series, that the horizontal lines on the chains are stepped-up as we proceed towards the right; the upper series do not shew this peculiarity. Another point is that in only one case does one of the marks coincide with the red line c, and never at all with the black line b; had this not been so one would imagine that two sets of measures were being compared. {19}