...weeks since the slave was put into his charge by Mr. Shepperson, freight agent on the Central road, who brought him from Trevillian's Depot. The negro's story is, that he was hired by his master to Burwell McKinney , of the army; that he accompanied his hirer to Pennsylvania, and was taken prisoner at the battle of Gettysburg; that he returned to Stafford with a portion of the Yankees, and there escaping from th...