You can read that online.
Google Books: Laurel Brigade
The men called him "Bill." He did not wear a uniform. On one occasion, I recall a story that he saw some federal cavalry getting the upper hand on one of his men, so pitched in himself to save him. For such he was much respected by that brigade, but they still called themselves "Ashby's cavalry."
In his memoir, John S. Mosby speaks of him, and the intense personal and professional dislike between him and Jeb Stuart.