The Tragedy in Ouachita Parish.Moxrob, La., March 31.—J. II. Wisne*. ; sheriff of Ouachita parish, wns murdered here last night, about nine o’clock, by a party of fifteen or twenty armed men* who came for the purpose of releasing one Mr. Beavers who was accused of murder. The mnh also killed one rregro by the name of Offut Johnson, who was w itness against Beavera.ft seems that (lie mob arc* mpjished what it intended, alt; it retired ; ftcr Beav-! ers was reloased, having first barred the jail to keep other prisoners safe.Another man named John Wimberlv was killed yesterday evening in a private ditliculty \ry Dr. Dinkgrnve. The particulars arc unknow n.