My pleasure. I'll email him soon on that. Incidentally, his new book, Failure In The Saddle, just won the Atlanta CWRT Richard Barksdale Harwell award for best civil war book of 2010. Dave is working on Maps Of Chattanooga now.
Dave's research is fantastic. When we went down there in March 2007, Dave's back seat was lined with regiments on both sides neatly tucked in boxes.