"Normally I wouldn't have shed blood in a place like this, either." Hannibal admitted. "The circumstances unfortunately required it."
He moved to lend a hand with Erik's task, feeling that he could not let the other man do all the work when it was not him who made the mess. The curtain would do nicely, though. As long as they didn't set it up against something where it might leave a stain from the blood that had soaked through.
There were many things, really, about this entire encounter that had Hannibal doing it in a way that wasn't particularly safe for himself. He had not worn gloves, he had left the victim alive enough to hear and understand - which could have ended in screaming, it was only luck that it had not. And he had not locked the door of the room before setting to his task.
He was grateful that it was Erik who had made the discovery and not somebody else. His passion and need had overcome him. It could have been disastrous.
When the curtain was down, Hannibal turned to the body, looking it over.
"You know, I could make you quite a nice meal." The words were spoken for Erik, not the dead man.