"Well obviously."
Severus held the book he had been looking through out to her.
She took the book gently; it was old and heavy and open to a potion.
Confused, she looked up at him. "What is this for?"
"We have to cloak ourselves somehow. He won't be fooled by in invisibility cloak, potion, or spell. This is the best way. Our only way. Unless you want to go back now."
She glared at him. "I'm not leaving you." She glanced down at the page again then back up at the man. "This potion is illegal."
"Is that a problem?"