For polished stonework the material was pecked by blows, ground with other stones, and smoothed with fine material.
The annual flooding now appears to be actually beneficial to the stonework, by removing the disintegrating salts and incrustations.
Much damage was done to the tower, and the nave roof perished, for the fire reached practically every part of the building, though the stonework of the nave suffered comparatively little.
The smoke-laden atmosphere has been found not infrequently to exercise a deleterious effect upon the stonework of important buildings; and through the same cause the appearance of London as a whole is by some condemned as sombre.
The remarkable ruins of Palenque, Uxmal, Chichenitza, Lorillard, Ixinche, Tikal, Copan and Quirigua, with their carved stonework and astonishing architectural conceptions, show that they had attained a high degree of civilization.