Remi and Sam boarded their plane out of San Diego two days later. The flight took them to New York JFK, where they had to wait for their next plane to leave for Madrid in the late evening. The flight brought them into Madrid-Barajas Airport early in the morning.

When they had been hiking in Guatemala, they had tried to look like ecotourists or history buffs so they’d brought only well-worn tropical clothes, which they had rolled up and carried in their backpacks. This time, they were traveling as a pair of rich American tourists who couldn’t possibly be doing anything serious.

They had bought new matching luggage that looked as expensive as it was. Each piece had an embossed leather tag sewn on that said “Fargo,” and one was packed with the Brioni suits Sam had bought a few months ago in Rome, the other with some of Remi’s fashionable dresses, shoes, and jewelry. Remi brought a Fendi perforated-leather sleeveless dress with a nude silk lining she’d been saving, a Dolce & Gabbana floral-print dress, and a short J. Mendel silk crew-neck dress that had made Sam watch her walk all the way across the room when she’d tried it on.

Also inside their bags were small digital spy cameras, two embedded in watches and two in clear eyeglasses. They knew that if the copy of the codex existed, they would not be able to remove it from the building, and getting permission to photograph it would be at least difficult and maybe impossible. Even worse, just asking permission would announce to the rest of the world that the copy existed and would soon reveal what it contained.

They flew first class on the transatlantic flight, and, when they arrived, they took a taxi to the Chamartin station and boarded the streamlined Alta Velocidad Española bullet train to Valladolid. The train took only an hour and ten minutes to cover a hundred thirty miles, including passing through a seventeen-mile tunnel. Selma had made a reservation for them at the Zenit Imperial Hotel, a fifteenth-century palace next to the Town Hall and the Plaza Mayor. She also downloaded a digital version of a guidebook to Valladolid on Remi’s iPad.

Sam and Remi spent their first day exploring the city, validating their appearance as rich tourists who had time to spare. The modern city of Valladolid is a manufacturing and communications center and a major grain market, but they entertained themselves by seeking out the old city, where the remnants of the Middle Ages still stood.

Remi read from a guidebook as they walked from place to place. “The Spanish conquered the city from the Moors in the tenth century. Unfortunately, they forgot to ask the Moors what Valladolid meant, so we don’t know.”

“Thanks for that,” said Sam. “Anything else on the list of missing facts?”