Regulus narrows his eyes in confusion, the potion slowing him down and making it difficult to follow Remus in his anger, but after a few moments he shakes his head slowly. "No one told me. My own idea. No, no one else knows. No one else even knows about the horcruxes. The Dark Lord doesn't trust any of the Following with his secrets."

He pauses, then adds regretfully, "I don't think a horcrux can be destroyed without dying, and I have to do it. I'm sorry. I always liked you the best."