sixth days."(176) (176) See Zoeckler, vol. ii, p. 475. But while these attempts to preserve the old theory as to fossil remains of lower animals were thus pressed, there appeared upon the geological field a new scientific column far more terrible to the old doctrines than any which had been seen previously. For, just at the close of the first quarter of the nineteenth century, geologists began to examine the caves and beds of drift in various parts of the world; and within a few years from that time a series of discoveries began in France, in Belgium, in England, in Brazil, in Sicily, in India, in Egypt, and in America, which established the fact that a period of time much greater than any which had before been thought of had elapsed since the first human occupation of the earth. The chronologies of Archbishop Usher, Petavius, Bossuet, and the other great authorities on which theology had securely leaned, were found worthless. It was clearly seen that, no matter how well based upon the Old Testament genealogies and lives of the patriarchs, all these systems must go for nothing. The most conservative geologists were gradually obliged to admit that man had been upon the earth not merely six thousand, or sixty thousand, or one hundred and sixty thousand years. And when, in 1863, Sir Charles Lyell, in his book on The Antiquity of Man, retracted solemnly his earlier view--yielding with a reluctance almost pathetic, but with a thoroughness absolutely convincing--the last stronghold of orthodoxy in this field fell.(177) (177) See Prof. Marsh's address as President of the Society for the Advancement of Science, in 1879; and for a development of the matter, see the chapters on The Antiquity of Man and Egyptology and the Fall of