Fig. 1. Granite core (UC16036)
from Giza of 4th Dynasty date. (height. 11 cm. The
Petrie Museum, Photograph by Jon Bodsworth The
"Gizeh UC16036 Granite Core from Tubular Drill
Hole. Pyramids & Temples of Gizeh, VII, 7; p. 77. Tools & Weapons,
LII, 59; p 44. Dyn. IV"