There's also no heavy oak door protecting this magazine. There is a locked door, but a troublemaker could just toss a match through the grate on this door...could it have been that this magazine, in the counterscarp, wasn't thought to be as vulnerable to enemy action? The only way into the counterscarp is through the fort itself, and the tunnel that leads to the counterscarp isn't visible from outside the fort. I guess if an enemy had gotten into the counterscarp, the fort was already lost, so why bother hanging an expensive oak 'n' stud door on this magazine?