Again, irrespective of the direct teaching which we may gather from them, particular epochs in history have the charm for us which dramas have-- periods when the great actors on the stage of life stand before us with the distinctness with which they appear in the creations of a poet. There have not been many such periods; for to see the past, it is not enough for us to be able to look at it through the eyes of contemporaries; these contemporaries themselves must have been parties to the scenes which they describe. They must have had full opportunities of knowledge. They must have had eyes which could see things in their true proportions. They must have had, in addition, the rare literary powers which can convey to others through the medium of language an exact picture of their own minds; and such happy combinations occur but occasionally in thousands of years. Generation after generation passes by, and is crumbled into sand as rocks are crumbled by the sea. Each brought with it its heroes and its villains, its triumphs and its sorrows; but the history is formless legend, incredible and unintelligible; the figures of the actors are indistinct as the rude ballad or ruder inscription, which may be the only authentic record of them.