I'm glad you did jump right in. Carman constantly amazes me in the amount of work he put into the manuscript. Writing in an era of typewriters being the most advanced technology, no internet, no copiers, no word processing packages, he labored diligently to produce his manuscript. He sought out people, wrote hundreds, probably thousands of letters, and read dozens of books, maybe hundreds. He was fair, didn't discriminate between union and Confederate accounts and veterans, and honest, calling out what he perceived as mistakes and bad judgement, praising successful achievements. He must have walked the battlefield many, many times to get such a thorough understanding of the topography. Let me give you an example - When writing about the famous Lost Order, S.O. 191, he wrote to Sam Pittman, the Union staff officer that identified the author of the document. Pittman told him how he and Robert Chilton, Lee's aide that wrote 191, knew each other. Primary source research, you can't beat it! A great man and a great historian.