Note 219 — Chapter III · (continued 2)
Walter Armstrong translation
According to Jomard, the casing stones of the Great Pyramid were "a compact grey limestone, harder and more homogeneous than those of the body of the building" (Description de l'Égypte, t. v. p. 640); but according to Philo, this casing was formed, as we have already said, of various materials, so we need feel no surprise if blocks of granite or other rock are shown to have formed part of it.