Areest op a Supposed Murderer.—A short time sin^we gave the particulars of a stabbing affair thfat occurred upon the night of the 24th ult., at a dance given in Sharpsburg. The mac stabbed was a .German named Frederick Steinke, and it is said that the perpetrator of the deed was an Irishman, one Jaoob Outen, who afterward made hi3 escape into Kentucky. On Wednesday by a ruse he was inveigled to this side of the river, when he was arrested by the Police, and yesterday committed for future examination. He is quite a youag man, evidently under twenty years of age.