Perhaps Lupin was lying. That was always a possibility; however, being a Gryffindor, Lupin was far more likely telling the truth. Still, Regulus resolved to send his own letter to Granger, confirming Lupin's words. He wouldn't want to meet the business end of her wand. Regulus wasn't the type to underestimate his opponent, and he knew too much about Granger's accomplishments to doubt for a second that if she wanted him dead that would be what happened. He could hope that her Gryffindor righteousness would prevent that if it really came down to it, but he preferred not to take the risk.