Lord Voldemort tightened his grip on the parchment, his hands clenching in annoyance. He had, indeed, tried to incinerate the missive with both magic and mundane flame, both failed. The written postscript was obviously a code word of some sort, spelled to reveal something else when spoken aloud. Had she not been challenging him he would have admitted his admiration of her audacity and accomplishment. This wan seeming piece of magic intrigued him. Impressive really, especially for a teenage mudblood. The parchment could not be destroyed, it simply lay there awaiting his word. He summoned those followers currently in Malfoy Manor and Severus Snape.