AUTHORS’ NOTE

ROTOR, as Will and Dr. Burrows spotted on the map in the radio operator’s booth, was an extensive air defense radar system built in the 1950s by the British Government on sixty-six sites in response to the perceived threat from the Soviet Union. It is not an acronym, which just goes to show that Dr. Burrows doesn’t know everything (even if he correctly identified the Sten submachine gun, pictured above).