When Taran MacQuarrie is hanged, his eyes are closed. Later, when Claire is ejected from the prison by Black Jack she lands near MacQuarrie and his eyes are open.
Absalom is a priest and yet there is a wedding band tan and indentation line from the actors real life wedding ring.
There is no standard height for a prisoner to drop to break his neck and this was not the manner of hanging used in the 18th Century. The "noose" was rather more often a slip-knot designed to strangle the condemned man.