Perceptive, for a Muggle. "Perhaps," he conceded aloud. In fact, he'd suspected for a while now that a lack of magic might well prove the key that unlocked the curse. The only question was, how to use it.
Snape cut her a sidelong glance as he re-pocketed the pot of salve. "Since I've never been a Latin professor, I'll let you do your own research."
He regarded the newly healed skin with a tiny, satisfied smile. "I shall see you later. Do let me know if your symptoms change."