Another snippet of useless( I hope) information, not relevant to Jackson, but concerning hangman Berry mentioned above. He it was who settled the mechanics of the long-drop method of hanging. The technical thing to solve was having the drop long enough to kill the person instantly, but not so long as to rip the head off. Berry came up with the formula 112 divided by the weight of the prisoner in stone, this gives the appropriate length of the drop in feet. (There were minor modifications to this according to musculataure of the neck etc).