But the same capacity belongs to the facts of history. And we do not mean merely that, from subjective differences in the minds reviewing them, such facts assume endless varieties of interpretation and estimate, but that objectively, from lights still increasing in the science of government and of social philosophy, all the primary facts of history become liable continually to new theories, to new combinations, and to new valuations of their moral relations. We have seen some kinds of marble, where the veinings happened to be unusually multiplied, in which human faces, figures, processions, or fragments of natural scenery seemed absolutely illimitable, under the endless variations or inversions of the order, according to which they might be combined and grouped. Something analogous takes effect in reviewing the remote parts of history. Rome, for instance, has been the object of historic pens for twenty centuries (dating from Polybius); and yet hardly so much as twenty years have elapsed since Niebuhr opened upon us almost a new revelation, by recombining the same eternal facts, according to a different set of principles. The same thing may be said, though not with the same degree of emphasis, upon the Grecian researches of the late Ottfried Mueller. Egyptian history again, even at this moment, is seen stealing upon us through the dusky twilight in its first distinct lineaments. Before Young, Champollion, and the others who have followed on their traces in this field of history, all was outer darkness; and whatsoever we _do_ know or _shall_ know of Egyptian Thebes will now be recovered as if from the unswathing of a mummy. Not until a flight of three thousand years has left Thebes the Hekatompylos a dusky speck in the far distance, have we even _begun_ to read her annals, or to understand her revolutions.