When you exit the courtyard, you will see the WC to your left, while the staircase to the right leads to the castle exit and the bastion of Robert. You need to exit the castle (you can re-enter with the same ticket) and go down the old staircase. Only do so if you are determined to see everything and/or experience the famous staircase. Remember, though; you will have to climb back up to continue the tour. It's 226 steps to the cobblestone ramp on your right that leads to the bastion. Before you reach the ramp, at the 202nd step, there is a path on your left leading towards the old magazine we mention in the stories. Once you are done exploring the bastion of Robert, climb back up and re-enter the courtyard of Saint Andrew.