The actual purpose does not extend to all the details of these deep inquiries, but is chiefly confined to ascertain and prove the similarity of the oldest primitive monuments of both hemispheres, and whereby a connection of coeval and similar civilization is evinced in the earliest times before the records of history. This evidence, which may be called _monumental_, dives into the gloom of past ages, and hence descends to ours, reaching our understanding by gradual links: while the _philological_ evidence of spoken modern languages, fragments or children of older primitive languages, ascends by their means to equal antiquity; both combining, therefore, to complete the history of mankind, where annals and traditions cease to lead us or are quite obscure: these combined bring more certainty to the scrutinising mind than the mere physical features of men, and their complexions, so fluctuating and mingled. But neither of them solve the question of the actual original Cradle or Cradles of mankind. If indeed monuments and languages of various parts of the earth were quite different, and the features or colors of men likewise distinct there, we might suppose there could have been several species and cradles of men: but it is not so, features and languages are so variable and mingling in our own times, and so diversified every where, as to baffle and preclude complete insulation. Monuments are also after all so much alike in many remote parts, that although divisible into styles of various ages and stages of improvement, they do evince a great similarity in coeval ages or stages of civilization.