Valentine laughed, but readied for a fight. This person was obviously insane, stupid, or extroadinarily skilled. Possibly some combination of the three. If it were the third, he could be in trouble.

"It's a bit of a long story." He said, putting on a Scottish accent to disguise the fact that he was a member of the British nobility. He struggled up a lie, and or lack of anything better to do, he decided to say something so insane that no-one would believe him. "I'm trying to kill the Pope, y'see. He took the last seat at a restaurant, and to me, that's inexcusable. So, I'm tryin' to kill him."

He hoped that his rough accent and manner of speaking would prevent his opponent from guessing his background. "And I ain't leavin' 'till he's dead."