Hi Mary! I've heard the story about Chamberlain also. Similar stories have been told before from people involved in military campaigns.
Things like that do make you wonder. I suppose the only way to have any evidence would be to find out if there were any stories of ghosts in the area prior to the Civil War -- which of course more than likely, would not be documented.
I like the ripple in time/vortex theory. On the other hand, so many lost their lives there, some form of paranormal activity seems almost a given.