From Louisville

Jjouisvili.k, Oct 20. Major General Graüt assumea cornniuurl of the Armies of t Ohio, the Cuinberland, and Kentuckv, with plennry powers, Htí leit íor Ñiish villa tbifi morning to sssanje direciion of aflaira at Cliattanootfa. Gen. Thomas takes coinmaiid oi General Rosecraus, army. Koseerans being ordered to Cincinnati, and to report by etter to the Adjatant General a Washington. General Garfih! and Stedrnan arrivcd to riight.