When it came to jobs at the castle, a lot of the guards were jealous of Frederick. He was in charge of the night shift for the boiling oil that they could pour over enemy soldiers coming through the main entrance. with the castle being in northern Denmark, and it’s cold climate, Frederick was warm in winter while the archers on the parapets had to wrap themselves in multiple elk skins. Then the Duke remodeled the entrance to use interchangeable archers to fire through murder holes. Frederick was not so good with a bow and arrow, and he was downsized.