In The Expressman and the Detective Allan Pinkerton tells how his relatively small P.I. firm succeeded in this first big case. Tens of thousands of dollars had gone missing. The suspect was too smart for the police so the robbed company asked Pinkerton to step in. Nine detectives worked this case for ten months. The suspect did take them on a very long chase. Some of the detective travelled miles and miles following the suspect while others followed his wife.