When Caswell is sitting on his horse and the hangman's rope around his neck, the amount of slack in the rope and the position of the noose change during the opening conversation. The horse also bolts before it is struck by the man.
When Caswell disappears, the silhouette of the noose is at an angle but when the real noose is shown, it's hanging perfectly straight.
When Caswell and the intruder are fighting a stunt double can be clearly seen in place of the actor Albert Salmi.
The "sky" seen behind the noose has creases/wrinkles in it.
Mr. Caswell acts surprised at the sight of the lighter, yet lighters were invented in approximately 1823.