Read the caption. It’s a copy.
Does not matter.
“Until now, the recon map was unknown, never seen.... found it during frenzied Internet research...Markel discovered a copy of the map on a National Oceanic and Atmospheric Administration Web site while looking up information on the document’s creator, Poe.”
*****
Either I am confused, and/or the reporter is. She found this map on the internet?? Seems that SOMEBODY had laid eyes on it then. And if so - spill your coffee? Print it out again.
Or - was she doing research on Poe, came across the “well known defenses of Knoxville map” that then led her to discover ANOTHER actual map (not a webpage!) somewhere?
Regardless - I love old maps. I have a large book about the Revolutionary War with copies of the battle sketch maps, old letters, etc. Neat stuff.