Gibbeting 

Gibbeting was a post mortem punishment used for such people as highwaymen and pirates. After they had been hanged in the normal way, their body was taken down and then coated in pitch. It was then put into an iron cage which they had been previously measured for and had been specially made for them. 

This cage went over the head, torso and upper legs. The cage and body were then suspended again by a chain from the gibbet which was like a simple gallows but normally higher and set up at a prominent place, e.g. a crossroads or the top of a hill. The body would be left until it had rotted away - perhaps a year or more - to serve as a reminder of what happened to these classes of criminal. Gibbeting also denied the criminal a decent burial which was a punishment in itself in those days (16^th - 18^th centuries)

Hanging in Chains or Irons

Hanging in Chains is essentially the same as Gibbeting save for minor differences in the hanging mechanism. These punishments were reserved for revolting slaves and pirates