Simon Mills reveals info
Mr. Arthur boarded the train to Marsh City. Since, He knew the suspect is under control. He didn't feel any stress for this interrogation. He then operated his sci-fi watch to go through the report about Simon Mills again.
Earlier, he once again called their beach office to ask about Simon Mills. But, they told me he haven't come back from vacation. After learning that He knew the real Simon Mills is perhaps died. The chances of him being very alive is slim. So, he is very curious about other party's identity. He then shut his eyes, patiently awaiting for the destination.
On the other hand, Time went on, After eight hours, the imposter Simon Mills regained his consciousness but his mind is somewhat fuzzy. He is sweating, a small bead like sweat is dripping from his forehead. Little by little, the imposter Simon Mills regains clarity. A moment later he recalls the whole incident.