Severus leant back, craning his neck around the open door at the sound of rustling parchment and a book's landing with a thud on the flagstone. He squinted his eyes slightly, peering down the dim hall, and smirked at the sight of his erstwhile penfriend. "Do you need any help?" he asked, frowning ever so slightly when his conscience caught up with him. If he'd been caught like that -- books and parchments scattered all over the corridor -- he knew he wouldn't appreciate being smirked at, so he thought he'd best afford Linton the same courtesy.