Paul walked to the front of the packet tube and entered an address on a keypad. A vault door shunted open. He tossed his backpack into the padded capsule. "I’m leaving you because I must," he said patiently, "but I’m leaving you in lovely Stuttgart. I hope you’ll put your time here to good use." The capsule vanished. Another capsule instantly took its place. Paul hit a repeat key, crawled deftly into the padded interior, and doubled his arms around his knees. "Until we meet in Praha, Maya."