These are the photos I have managed to take of the Armagh Gaol so far. I have held off on returning to take more because I am being allowed inside the prison tomorrow, where I plan to take much more photos of both the inside and the outside of the building. There will be much more where this came from.
In addition to my photos of the actual prison, I visited the Irish Republican History Museum while in Belfast. Inside the museum was a replica of an Armagh Gaol cell, including all of the actual furniture and the cell door that was once used in the prison. I was very happy to have found this, as there is none of this furniture left in the actual jail anymore.