Marius replaces the newspaper and walks out himself. He spins his thoughts, ordering his next steps. Follow the man, gather intelligence; regroup with Reginald and the BOI, warn them to watch for shadowers; organize the trip to Louisiana, hopefully with Algier looking the other way towards Turkey.
The hunter waits patiently before shadowing his mark. He stalks him from a distance as far as he can, checking regularly behind him to see if a second person is following him. He breaks off the chase if it seems that he has been spotted—no need to walk into a trap.