The importance of monumental remains as incentives to historical study and research results directly from the interest and curiosity which their examination invariably excites. Gibbon relates that he was first prompted to write the annals of Rome's decline and fall by the contemplation of her ruined structures. Few even of the most prosaic and matter-of-fact travelers can resist the impulse to reason and speculate on the origin of ruins that come under their notice, and the civilization to which they owe their existence; and there are probably few eminent archæologists but may trace the first development of a taste for antiquarian pursuits to the curiosity excited at the sight of some mysterious relic. This irresistible desire to follow back remains of art to the artist's hand and genius, prompted the oft-repeated and so long fruitless attempts to decipher the Egyptian hieroglyphics and the cuneiform inscriptions of Persia and Assyria. These efforts were at last crowned with success; the key to the mysterious wedges, and the Rosetta-stone were found, by which the tablets of Babylon, Ninevah, and the pyramids--the Palenque, Copan, and Teotihuacan of the old world--may be read. The palaces, monuments, and statues of ancient kings bear legible records of their lives, dominions, and succession. By the aid of these records definite dates are established for events in the history of these countries as early as two thousand years before the Christian era, and thus corroborations and checks are placed on the statements of biblical and profane history. But the art of interpreting these hieroglyphics is yet in its infancy, and the results thus far accomplished are infinitesimal in comparison with what may be reasonably anticipated in the future. * * * * * [Sidenote: THE ANTIQUITY OF THE HUMAN RACE.] So much for antique monuments and their teachings--alone and in connection with history and tradition--respecting the peoples to whom they owe their existence. Another and not less important value they have, in connection with geology and paleontology, in what they tell us about the age of the human race on the earth. Biblical tradition, as interpreted in former times, asserts the earth and its inhabitants to be about six thousand years old. Geology has enforced a new interpretation, which, so far as the age of the earth is concerned, is accepted by all latter-day scholars; and geology now lends a helping hand to her sister sciences in their effort to prove, what is not yet universally accepted as truth, that man's antiquity far exceeds the limit which scripture is thought to establish.