Ghostly avenger, a

Charles Montgomery Skinner (1852-1907) was an American writer who published myths and legends collection books. His dream was to make American folklore heritage more glorious. Skinner worked in a wide range of genres, he worked as a journalist and a playwright. Civil War even nowadays is considered the most terrible and horrific period in the history of any nation. The plot of the story refers to the end of the Civil War where the main character a lieutenant Charles Murphy suddenly was in trouble. On a midnight he was awakened by a violent flapping of his tent and in the shadow of a tree appeared a strange man. It was his brother, who, in a low, grave voice, told him that he needed his help. What happened and why did he look like this?