Arthur nods, frowning in concentration. He can think of a million reasons why the vampires would have taken Lancelot and subjected him to the pain he went through, but that's not why he's here.

"I need to know if you overheard anything," he says, tone still measured and cautious. "If they thought they were going to kill you anyway they may not have been careful about what the said. Even things that don't seem related, like... the name of a borough or a person or... anything. Anything that could indicate what they're going to do next."