Period 5 HSA

You decide to hide behind the stairwell, and just in the nick of time. As you are getting into position, a French soldier appears in view, brandishing a musket. He mutters underneath his breath, "I thought I saw something move down here..." The soldier turns around and starts to ascend up the stairwell. You come out of your hiding place when a glinting object catches your eye. It's the keys to the cells! What do you do?