Irvine was not optimistic. Finding a bank that kept a record of serial numbers of its currency seemed highly improbable. It was a long shot, but every avenue had to be followed. He watched as Sigler went through several clothbound ledgers. At last, he opened one and nodded.

“Here you are,” Sigler said triumphantly. “The serial numbers our bookkeeper recorded of all the currency in the vault two days before the robbery. Some of the bills, of course, were distributed to customers. But most were taken by the bandit.”

Irvine was stunned as he opened the book and stared at the columns of neatly inked numbers within the lines of the pages. There were several different kinds of large banknotes. Gold certificates, silver certificates, notes issued by individual banks were recorded in the ledger. United States Treasury serial numbers were printed vertically and horizontally on the sides; the local bank that issued them added their own number at the bottom. Most came from the Continental & Commercial National Bank of Chicago and the Crocker First National Bank of San Francisco. He looked up at Sigler, now fired with elation.

“You don’t know what this means,” Irvine said, gratified beyond his greatest expectations. “Now we can pass out numbers on the stolen bills to every bank in the country where the bandit might have deposited them. Handbills with the numbers can also be distributed to merchants throughout the West, urging them to be on the lookout for the bills.”

“Good luck,” said Sigler pessimistically. “It’s hardly possible that you can trace them back three years. Any one of them could have changed hands a hundred times by now.”

“You’re probably right, but hopefully the bandit is still spending them.”

“Slim chance of that,” Sigler said with a tight grin. “I’ll bet a month’s wage he spent it all a long time ago.”

Sigler was probably right, Irvine thought. But Irvine was not discouraged. Bell had said that it would be an insignificant mistake that would trip the bandit up. Now it was only a question of getting the information out to banks and merchants and hope there would be a response that led to the whereabouts of the mysterious killer.

13

CURTIS SAT AT A TABLE IN THE WESTERN ARCHIVES Division of the Union Pacific Railroad’s office in Omaha, Nebraska, surrounded by high shelves filled with ledgers and account books of reports on train operations. During the nine days since he launched his search, he had scoured the records of four different railroads and the Wells Fargo stage lines trying to find a link for how the Butcher Bandit escaped capture after committing his robberies and hideous murders.