...t Perryville, the history of this campaign thence forward might have been different. He had, however, countermanded his order before he heard from General Polk, and on the 4th, upon the approach of Sill 's cavalry, retreated from Frankfort to Versailles. The effect of the sound of the Federal artillery was similar to that of the artillery of Waterloo upon the gay throng at Brussels. The capital w...