I have found other errors in the summary section!

4402.1 inches must be a mistake! 9068.8 / 2 = 4534.4 – 102 = 4432.4 inches

Here is another error.

Look at the chart under (Beginning of Ascending passage) far right column (Above Pavement) it has + 179.9 ± .2

But from here we have 172.9 inches.

Petrie Chapter 7 section 39 [p.65]
“These, added to previous amounts, give for the absolute place of the floor end at the latitude of the E. wall of the gallery (172.9 + 679.7) = 852.6 ± 3 level above pavement; (1517.8 + 1389.5) = 2907.3 ± .6 horizontally from N. edge of Pyramid, or 1626.8 ± .8 northwards from centre; and 287 ± 1.5 for middle of passage eastward from centre of Pyramid.”


So it says 179.9 inches in the summary but it should be 172.9 inches! This caused me a problem at first because I used the summary to input for the ascending passage. I had to work backwards to find the mistake.

RLH