The Great Pyramid : observatory, tomb, and temple (1888)
Proctor, Richard A. (Richard Anthony), 1837-1888 · London : Longmans, Green · leaf 148
^Z Socket Fig. 9. Horizontal Section of the Great Pyram;, S^oc2c£i^yT: … irough floor of Kings (Ihamber. THE PROBLEM OF THE PYRAMIDS. 139 the gallery and to the observer at O. All suchobservations as the easting, southing, westing, andnorthing of heavenly bodies would belong to theobserver at O, uprights of suitable height beingerected at n., e., s., and w. He could…