It is as I suspected: at night, demons walk the Earth in the desert behind my workplace. I have discovered the print of cloven hooves in the dried mud as well as doglike tracks which I take to be their Hounds of Hell.
I have never spied these monsters during the day. Perhaps they fear the sunlight, but more likely it is my purity that keeps them away. If ever my employers seek to dismiss me, I will have to impress upon them how vital my presence is to their safety. They must not be allowed to fire me -- it's for their own protection.