- hangman and executioner, just like his father before him.

An encounter with Jock was rarely a happy experience, as you're about to discover…

- such as William Brebner, who believed that prisoners should be kept in strict isolation.

But by the 1850s, with over 100 prisoners in a jail built for 57, the crank had been installed, prisoners were being flogged and shackled, and a harsh regime was in place…

- just over 7 feet wide, and 13 feet long.

Home to convicts such as Margaret Mitchell, three months pregnant when she was sentenced in 1850 for the theft of a watch, and destined to have her baby in jail.

What's that noise - is there a prisoner making a desperate attempt to escape?

On the top floor of the jail a fascinating exhibition takes you through a day in the life of a prisoner in Scotland, 150 years on from the rigours of Victorian times.