The Treasure of the Commander

After your successful escape, a ragged messenger bearing the symbol of the Knights of Malta approaches you one evening in a tavern. He identifies himself as a former knight of the Commander Georg Florsädt and hands you a letter. You recognize the seal, the Commander was imprisoned with you and you had a friendly relationship with him...until his execution. Florsädt reveals in the letter that Colonel Schwuski has been pillaging and burning many farms and churches in the surrounding area just to get their gold. He is storing up this treasure in a hiding place deep in his dungeon to assemble an army against the Duke. Therefore, he sincerely begs you to steal his now substantially increased treasure from the dungeon and thus out of the Colonel's hands. To help you, he has hidden everything he found out and noticed about the whereabouts of the treasure in the "steeply sloping grave" right in the dungeon cell. So, the first task is to get back into the cell. After weeks of observation, you have finally found an unreliable guard who always disappears into the tavern with the shift leader before his shift for an hour and only leaves the castle gate ajar so he can return unnoticed. The time has come again. The drunk disappears with his pal from the dungeon towards the tavern. It's time to go. The goal is to find the treasure and open the chest.