Mulberry starts to walk forward, and then realizes that if this is the only entrance, she can guard it against anyone coming in with some runes. Two spells come to mind. She knows the one in the apartment is "Need-Big-Person-Big-Protection". "Need-Big-Death-Big-Person-Big-Protection" is the second spell the mare thinks of, and is from in front of Mr. Peacock's door. Both of these enchantments have quite a few "Big" runes within them.