Attempts have been made to throw doubt upon these implements, first upon their nature, and next upon their genuineness; but we think no one who weighs the evidence candidly and carefully, can award to these doubts the merit of respectability. That they are works of art and not native forms, is, we think, as fully established as human observation can establish anything; and though frauds have been recently detected, it would be no more absurd to attribute the whole phenomena of fossil remains to fraudulent manufacture, than to refer to the same source the whole series of flint implements. In many cases the flint tools were taken out of their position by the hands of scientific men themselves, and in others the excavations were made under their immediate supervision. M. Gandry, in giving an account of his researches at St. Acheul, in 1859, to the Royal Academy of Sciences at Paris, says: 'The great point was not to leave the workmen for a single instant.' But the most remarkable, not to say startling revelations of the whole book, are those pertaining to the discovery of an ancient place of sepulture at Auvignac, in the south of France. Here we seem to be brought, as it were, face to face with the denizens of the departed ages, and to have them start up from their ancient tombs to tell the story of their death and sepulture. We enter this old burial place with feelings of more strange and solemn awe than we could have in threading the catacombs of Rome. An obscure village at the foot of the Pyrenees reveals in its precincts a more astounding history than all the monuments and mausoleums of the 'eternal' city.