The Splendid and the Vile: A Saga of Churchill, Family, and Defiance During the Blitz by Erik Larson
Authors: Erik Larson
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the wreckage of a German bomber downed in March 1940; it bore the phrase “Radio Beacon Knickebein .” More recently, after the RAF’s Air Intelligence Branch had made it routine practice to eavesdrop on conversations between prisoners, he had listened to a recording of two captured German fliers discussing what seemed to be a secret wireless navigation system.
And then came this latest message. Jones knew that Knickebein in English meant “crooked leg” or “dog’s leg,” and he believed that Cleves most likely referred to a town in Germany, known also by the spelling Kleve.The town had a famous castle, Schwanenburg, or Swan Castle, where supposedly Anne of Cleves resided before heading to England to become the fourth wife of Henry VIII. Swan Castle and the legend of the knight Lohengrin were thought to have influenced Wagner in his creation of the famed opera that bears the knight’s name.
Suddenly the pieces fit together in a way that made sense to Jones, though what he concluded seemed improbable. He was twenty-eight years old. If wrong, he would seem a fool. But if he was right, his discovery could save untold numbers of lives.
He knew that the geographic coordinates cited in the newly intercepted message identified a point south of the town of Retford, in England’s industrial Midlands. A line drawn from Cleves to Retford would delineate a vector, possibly an aircraft’s course or radio transmission—a beam or beacon—as evinced by the phrase “Radio Beacon Knickebein .” The term “crooked leg” suggested an intersection of some kind and, by Jones’s reckoning, raised the possibility that a second beam might intersect the first. This would have the effect of marking a precise geographic location on the ground, perhaps a city or even an individual factory. A technology already existed to guide commercial and military aircraft using radio beams, but only over short distances, to help them land in conditions of limited visibility. Known as the Lorenz blind-landing system, after its inventor, C. Lorenz AG of Germany, the technology was familiar to both sides, and was in use at airports and military airfields in England and Germany. It struck Jones that the Luftwaffe might have found a way to project a Lorenz-like beam all the way across the channel to targets inside England.
The prospect was deeply troubling. As things stood now, bomber pilots flying at night needed clear skies and moonlight if they hoped to achieve any degree of accuracy. With a system of the kind Jones imagined, German bombers could range over England on any night, without having to wait for a full moon or its brightest waxing and waning phases, even in weather that would keep RAF fighters grounded. The RAF was confident that it could counter air raids conducted by day, but at night its fighters had little ability to find and engage enemy aircraft, despite England’s radar network. Combat required visual contact, and ground radar simply was not precise enough to bring RAF pilots close enough to afford it. By the time the pilots received radar fixes from controllers at Fighter Command, the German bombers would already be in a different location, possibly at new altitudes and on different headings.
Now, at his morning meeting with the Prof, Jones laid out his theory. He was excited, certain that he had stumbled on a secret new German technology. But Lindemann—pallid, ascetic, lips turned down, as always—told him that what he proposed was impossible. Conventional blind-landing beams traveled only in straight lines, meaning that, owing to the curvature of the earth, by the time a beam from Germany traveled the needed two hundred or more miles to the skies above a given target in England, it would be beyond the reach of even the highest-flying bomber. This was accepted doctrine. And Lindemann, once convinced of a thing, was a very hard man to bend. As one close associate, Roy Harrod, put it, “I have never met anyone who, when once
And then came this latest message. Jones knew that Knickebein in English meant “crooked leg” or “dog’s leg,” and he believed that Cleves most likely referred to a town in Germany, known also by the spelling Kleve.The town had a famous castle, Schwanenburg, or Swan Castle, where supposedly Anne of Cleves resided before heading to England to become the fourth wife of Henry VIII. Swan Castle and the legend of the knight Lohengrin were thought to have influenced Wagner in his creation of the famed opera that bears the knight’s name.
Suddenly the pieces fit together in a way that made sense to Jones, though what he concluded seemed improbable. He was twenty-eight years old. If wrong, he would seem a fool. But if he was right, his discovery could save untold numbers of lives.
He knew that the geographic coordinates cited in the newly intercepted message identified a point south of the town of Retford, in England’s industrial Midlands. A line drawn from Cleves to Retford would delineate a vector, possibly an aircraft’s course or radio transmission—a beam or beacon—as evinced by the phrase “Radio Beacon Knickebein .” The term “crooked leg” suggested an intersection of some kind and, by Jones’s reckoning, raised the possibility that a second beam might intersect the first. This would have the effect of marking a precise geographic location on the ground, perhaps a city or even an individual factory. A technology already existed to guide commercial and military aircraft using radio beams, but only over short distances, to help them land in conditions of limited visibility. Known as the Lorenz blind-landing system, after its inventor, C. Lorenz AG of Germany, the technology was familiar to both sides, and was in use at airports and military airfields in England and Germany. It struck Jones that the Luftwaffe might have found a way to project a Lorenz-like beam all the way across the channel to targets inside England.
The prospect was deeply troubling. As things stood now, bomber pilots flying at night needed clear skies and moonlight if they hoped to achieve any degree of accuracy. With a system of the kind Jones imagined, German bombers could range over England on any night, without having to wait for a full moon or its brightest waxing and waning phases, even in weather that would keep RAF fighters grounded. The RAF was confident that it could counter air raids conducted by day, but at night its fighters had little ability to find and engage enemy aircraft, despite England’s radar network. Combat required visual contact, and ground radar simply was not precise enough to bring RAF pilots close enough to afford it. By the time the pilots received radar fixes from controllers at Fighter Command, the German bombers would already be in a different location, possibly at new altitudes and on different headings.
Now, at his morning meeting with the Prof, Jones laid out his theory. He was excited, certain that he had stumbled on a secret new German technology. But Lindemann—pallid, ascetic, lips turned down, as always—told him that what he proposed was impossible. Conventional blind-landing beams traveled only in straight lines, meaning that, owing to the curvature of the earth, by the time a beam from Germany traveled the needed two hundred or more miles to the skies above a given target in England, it would be beyond the reach of even the highest-flying bomber. This was accepted doctrine. And Lindemann, once convinced of a thing, was a very hard man to bend. As one close associate, Roy Harrod, put it, “I have never met anyone who, when once
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