FortruM Munroe, July '20. The steambont Tvuixian nrivmi hero this tnórninjj with sbout 4"J0 Union tnon on board, parolerl prinoners 'hii wore put on liuurd ubout twelvu mile thiu aide of liiehrnond, lo which placu tho rebels brough-t tlium n umbulance.-, and ilelivuiud lliein over to otir gnverninoiit. '1 hoy liva liet-n conCned n prison soveiiieoii day, and wèPo taken at Sav;igu:s StiHtod aml i.t othor pluces at tliu commencement oi the batile, and wore at the time mostly in hospital. They ?;iy tliey have been very well used. About eiglity have been sent to New Yorir in u sailing vossel, and the remaioder 'vill .'o to Philadelph'a in tho Loufeiana frorn boro tpnight. Their nuraes have nlready buep p'ibüshocl.