“I will use a chopper, at first,” Loh began. “A cleaver. Razor-sharp. I will start with your nose . . .” Louis Loh continued to recite lurid descriptions of the horrors he would inflict on Bell until Bell began to snore.

The detective opened his eyes when the train stopped in Sacramento. There was a knock at the stateroom door. Bell admitted two burly Protection Services agents from the Sacramento office. “Take him to the baggage car, manacle him hand and foot. One of you stays with him at all times. The other sleeps. I’ve got a Pullman berth for you. You will never let him out of your sight. You will not distract yourself talking to the train crew. If there is a cut or a bruise on him, you will answer to me. I will look in on you regularly. We will be particularly vigilant whenever the train stops.”

“All the way to New York?”

“We have to change trains at Chicago.”

“Do you think his friends will try to bust him out?”

Bell watched Loh for a reaction and saw none. “Did you bring shotguns?”

“Autoloads, like you said. And one for you, too.”

“Let them try. All right, Louis. Off you go. Hope you enjoy being luggage for the next five days.”

“You will never make me talk.”

“We’ll find a way,” Bell promised.

LUXURY TRAIN TICKETS, a suit of “wealthy English writer” tweed, a gold pocket watch, expensive luggage, and a hundred dollars were all it had cost the spy to hire the defrocked J. L. Skelton to masquerade as Arnold Bennett. So reported Horace Bronson, the head of the San Francisco office, in a wire waiting for Isaac Bell in Ogden. But although threats of a long prison term had frightened him into talking freely, Skelton had no idea why he had been hired to pretend to escort so-called missionary students.

“He swore on a stack of Bibles,” Bronson noted wryly, “that he did not know why he was then paid another hundred dollars to revert to clergy status and hold a service in the Mare Island chapel. And he denied any knowledge of why Harold Wing and Louis Loh tried to make it look like the Japanese blew up the Mare Island magazine to cripple ships of the Great White Fleet.” Horace Bronson believed him. So did Isaac Bell. The spy was an expert at making others do his dirty work. Like Arthur Langner’s big guns, he stayed miles away from the explosion.