Mr. Wallace says that man has existed on the earth a hundred thousand years, and that it is probable that he existed four hundred thousand years ago. Of course we do not believe this. We have little faith in the chronology of science. It gives no sure data for the calculation of time, hence we find them differing from four thousand to four hundred thousand years as to the time required for certain formations. The most trustworthy geologists teach that all that is known of the antiquity of man falls within the limits of Biblical chronology. The further, however, Darwinians push back the origin of man, the stronger, as against them, becomes the argument for the immutability of species. The earliest remains of man show that at his first appearance, he was in perfection. The oldest known human skull is that called the "Engis," because found in the cave of Engis in Belgium. Of this skull Professor Huxley says it may have belonged to an individual of one of the existing races of men. Principal Dawson, who has a cast of it, on the same shelf with the skulls of some Algonquin Indians, says it might be taken for the skull of an American Indian. Indeed, Dawson seems to think that these fossil human remains go to show that the earliest men were better developed than any of the extant races. Thirdly. The historical evidence accessible all goes to prove the immutability of species. The earliest historical records and the oldest monuments prove that all extant animals were what they now are thousands of years ago. Fourthly. The fact that hybrids cannot be perpetuated, that no device of man can produce a new species, is proof that God has fixed limits which cannot be passed. This Huxley himself admits to be an insuperable objection. So long as it exists, he says, Darwin's doctrine must be content to remain a hypothesis; it cannot pretend to the dignity of a theory. Another fact of like import is that varieties artificially produced, if let alone, uniformly revert to the simple typical form. It is only by the utmost care they can be kept distinct. All the highly prized varieties of horses, cattle, sheep, pigeons, etc., without human control, would be merged each class into one, with only the slight differences occasioned by diversities of climate and other external conditions. If in the sight of man it is important that the words of a book should be kept distinct, it is equally evident that in the sight of God it is no less important that the "units of nature" should not be mixed in inextricable and indistinguishable confusion.