I went looking for this book after another rewatching of the Ken Burns series. Cox’s writing is used throughout, and for good reason; he was a thoughtful, observant, and effective reporter of the events surrounding him.  Sadly, the four versions available for free have plenty of OCR mistakes (“Richmond” seems to be unreadable to every scanner in North America), but is worth checking out for descriptions like this.

[Sherman’s] nervous and restless temperament, with a tendency to irritability, might have raised a doubt whether he would be successful in guiding and directing men of the capacity of his principal subordinates ; but experience showed that he had the rare faculty of beconiing more equable imder great responsibilities and in scenes of great excitement. At such times his eccentricities disappeared, his grasp of the situation was firm and clear, his judgment was cool and based upon sound military theory as well as upon quick practical judgment, and no momentary complication or unexpected event could move him from the purposes he had based on full previous study of contingencies. His mind seemed never so clear, his confidence never so strong, his spirit never so inspiring, and his temper never so amiable as in the crisis of some fierce struggle like that of the day when McPherson fell in front of Atlanta.

If you want to read this without the digital errors, there is a version for sale that features actual scans of the original pages.

Atlanta : Jacob Dolson Cox : Free Download & Streaming : Internet Archive.