I've read about Camp Douglas on line and it is not surprising that your ancestor did not survive it. The conditions were deplorable. (It was referred to as the Andersonville of the South - only in my opinion it was worse because in the North there was the ability to feed and clothe the soldiers- they just didn't) I too had a Tennessee ancestor at Camp Douglas, but mine survived. He died at the Confederate Soldiers home at the Hermitage in Nashville. regarding Maury County- I believe the book "Co. Aytch" the Memoir of the Civil War by Sam Watkins was about men from Maury County. He was from Columbia, Tennessee. It is a great book for anyone with Confederate ancestors or just interested in "The War."