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)