Daniel's silence meant there was less of a chance that something would go wrong, which meant that it all rested on Javert - Vlad was confident in his ability to lie with ease, as he'd been doing it for nearly his entire life. He paid careful attention to the man's answers, deciding that they were suitable enough. Ignorance was acceptable; annoying, but not reason enough to be shot in the basement. Besides, they didn't have any intention of aiding the Tsar, so it wasn't even a lie.
He echoed the other man's claim of coming to see the sights, feigning ignorance on the current political situation and describing how the 'large group of people' outside the palace the night before had taken them by surprise. His French was nowhere near as good as Javert's, but it was passable. The questions about his last name and background were easy, as it wasn't hard to mix in bits and pieces of the truth with fabrication - he'd traveled enough to spin a convincing tale of the places he'd seen.
"What is wrong with Monsieur Klein?" The tall one asked suddenly, raising his head from the paper. "There was an unfortunate accident a few years ago, when he suffered a terrible fall, and he has never been quite the same since. He still has a basic level of understanding, but..." He trailed off, shaking his head regretfully. The two Russians exchanged looks and continued to take notes. Surely they couldn't actually be considered a threat? The two men couldn't be that incompetent.