I own a copy of this movie. It came as a two movie set with D.W. Griffith's 1930 movie "Abraham Lincoln." The scene in that film depicting General Robert E. Lee alone in his tent after signing the surrender at Appomattox was so real looking to me if somebody said it was actual hidden camera footage I may have believed it.
Picked up the two movie set for $1.00 plus tax at Walmart in Pineville, Louisiana in case anybody from that area is reading this. It was located on the sucker shelves... I mean the impulse item shelves right before the cash register :-)