Theodore Ayrault Dodge 
Campaign of Chancellorsville [EPUB ebook] 

Theodore Ayrault Dodge (May 28, 1842 – October 26, 1909) was an American officer and military historian. He fought as a Union officer in the American Civil War; as a writer, he was devoted to both the Civil War and the great generals of ancient and European history. His works on the Civil War include The Campaign of Chancellorsville (1881) and Bird’s Eye View of the Civil War (1883). (Excerpt from Wikipedia)