“Banks in mining towns aren’t in the habit of recording the identifying number of every bill that passes through their hands.”

“You might get lucky and find a bank that recorded the numbers of the currency sent from large city banks to make the miners’ payroll. If you do, we can trace them. The robber had to either spend the money or exchange the currency through bank deposits and withdrawals. A trail he can’t cover up.”

“He could have exchanged through foreign financial institutions.”

“Maybe, but he would have to spend it overseas. The risk would be too great for him to bring it back into the U.S. I’m betting he kept his loot in the country.”

Then Bell turned to Curtis. “Art, you check out all stagecoach and train schedules for any that departed the towns on the same day the robberies took place. If our man couldn’t be tracked by a posse, he might easily have taken a train or stage for his getaway. You can begin in Placerville, California.”

“Consider it done,” said Curtis firmly.

“Are you going to remain here and act as a command post?” asked Irvine.

Bell shook his head and grinned. “No, I’m going out in the field, beginning with Rhyolite, and retrace the robberies. No matter how good the murderer is or how well he planned his crimes, there has to be a stone he left unturned. There must be evidence that’s been overlooked. I’m going to question the mining town citizens who might have seen something, however insignificant, and failed to report it to the local sheriff or marshal.”

“You’ll give us your schedule so we can get in touch by telegraph if we come onto something?” said Curtis.

“I’ll have it for you tomorrow,” replied Bell. “I’m also going to travel through the mining towns that have large payrolls our man has yet to rob. Maybe, just maybe I can second-guess our butcher, set up a trap, and entice him to strike another bank on our turf.” Then he pulled open a drawer and passed out two envelopes. “Here’s enough cash to cover your travel expenses.”

Both Curtis and Irvine looked surprised. “Before now, we always had to travel third class, use our own money, and turn in bills and receipts,” said Curtis. “Alexander always demanded we stay in sleazy hotels and eat cheap meals.”

“This case is too important to cut corners. Trust me, Mr. Van Dorn will okay any monies I request, but only if we show results. The bandit may have everyone believing he’s invincible and can’t be caught, but he’s not faultless. He has flaws just like the rest of us. He will be trapped by a small insignificant mistake he neglected. And that, gentlemen, is our job, to find that insignificant mistake.”

“We’ll do our best,” Irvine assured him.

Curtis nodded in agreement. “Speaking for both of us, permit me to say that it is a real privilege to be working with you again.”