Crossword Spy: D-Day’s Strange Leak

Weeks before D-Day, readers of the Daily Telegraph began encountering some unusual answers in the newspaper’s crossword puzzle – Utah, Omaha, Overlord, Mulberry and Neptune. British intelligence noticed too. The man constructing the puzzles was investigated, the invasion went ahead, and the whole thing was dismissed as an extraordinary coincidence. Forty years later, one of his former students finally explained where the words had really come from. We tell the story here, then talk with owner of Promotions and Unicorns Too, Rob Einhorn! 

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There is a problem with secret code names that becomes obvious as soon as you think about them for a minute. A code name has to be ordinary enough that saying it doesn’t immediately sound like you’re discussing something classified, but it also has to be distinctive enough that everyone involved knows exactly what it means. During World War II, military planners produced thousands of these names, attaching innocent words to invasions, beaches, weapons, deception plans, supply operations and almost anything else they wanted to discuss without plainly saying what they were discussing.

Sometimes the result was a little too close for comfort. In August of 1942, British and Canadian forces carried out a disastrous raid on the French port of Dieppe, an operation intended partly to test whether a major occupied port could be captured in a frontal assault. The day before the raid, the Daily Telegraph published a crossword in which one of the answers was “Dieppe.” British security officials investigated and ultimately accepted that the appearance was a coincidence, because Dieppe was, after all, a real place that could reasonably turn up in a crossword puzzle.

That incident became considerably more uncomfortable less than two years later. By the spring of 1944, Britain was filled with military personnel preparing for an operation whose basic existence Germany could certainly anticipate, but whose exact timing and location had to remain secret. Hundreds of thousands of troops were gathering in southern England, enormous quantities of equipment were being moved into position, and an elaborate deception campaign was underway to convince German commanders that the main Allied attack might come somewhere other than Normandy.

The invasion had a name. The Allied campaign to establish a foothold in northwestern Europe was Operation Overlord, while the naval assault that would carry troops across the English Channel was Operation Neptune. Five landing beaches had their own names – Utah and Omaha for the Americans, Gold and Sword for the British, and Juno for the Canadians.

There was another word buried deep inside the invasion plan. The Allies knew that capturing a major French port immediately after landing would be extremely difficult, but an invading army needed a way to unload vehicles, fuel, ammunition, food and hundreds of thousands of tons of supplies. Their solution was to manufacture enormous components in Britain, tow them across the English Channel and assemble artificial harbors off the Normandy coast. Those prefabricated ports were called Mulberry harbors.

These names were classified information. Knowing that the Allies intended to land at places called Utah, Omaha, Gold, Juno and Sword would not automatically tell a German intelligence officer where those beaches were, but several code words appearing together could indicate that someone had access to invasion planning. Overlord was particularly sensitive because it referred to the larger operation itself.

Then somebody started putting them in the newspaper.

The Daily Telegraph was already one of Britain’s major newspapers, and its crossword was compiled by several setters. One of them was Leonard Dawe, a schoolmaster who had been producing Telegraph crosswords since the 1920s. Dawe wasn’t some anonymous hobbyist sending puzzles through the mail – he was an experienced crossword compiler and the headmaster of Strand School, a London school that had been evacuated during the war to Effingham in Surrey.

The first few words could be dismissed individually. Gold appeared. Sword appeared. Juno appeared. All three were perfectly reasonable crossword answers, and without additional evidence there wasn’t much anyone could do with them.

Then came Utah.

On May 2, 1944, just over a month before D-Day, 17 Across in the Daily Telegraph crossword carried the clue “One of the U.S.” The answer was four letters long. It was UTAH.

That was the classified name of one of the two American landing beaches.

It still wasn’t proof of anything. Utah was the name of a state, exactly the kind of compact four-letter answer crossword setters love, and a clue asking for one of the United States naturally could produce it. Even in the middle of one of the largest secret military preparations in history, coincidence remained a perfectly reasonable explanation.

Twenty days later, on May 22, another answer appeared. The clue was “Red Indian on the Missouri,” using terminology common at the time, and the five-letter solution was OMAHA. Omaha was also the classified name of the other American landing beach.

Five days after that, on May 27, the crossword included an eight-letter answer associated with a clue about a “bigwig.” The answer was OVERLORD. Operation Overlord was the name of the entire Allied invasion campaign.

Three days later, on May 30, another eight-letter answer appeared. The clue referred to a bush and “nursery revolutions.” The answer was MULBERRY, the name of the artificial harbors that would be constructed off Normandy.

Then, on June 1, with the invasion only days away, the crossword included the clue “Britannia and he hold to the same thing.” The seven-letter answer was NEPTUNE. Operation Neptune was the naval component of the D-Day assault.

Utah. Omaha. Overlord. Mulberry. Neptune.

All had appeared in the same newspaper’s crossword within roughly a month of the invasion. Some of the other landing beach names had appeared as well. British intelligence now had a problem that was very difficult to dismiss as an ordinary run of crossword coincidences.

The concern wasn’t that German intelligence could simply buy a copy of the Telegraph, solve the crossword and immediately discover the invasion plan. A German officer seeing the word “Mulberry” wouldn’t know that it referred to a prefabricated harbor, and “Utah” didn’t tell anyone where Utah Beach was located. The problem was that if someone in Britain knew these words were connected, their appearance could represent a signal.

There was a long history of intelligence being hidden in material that looked completely innocent. Classified information could be concealed in letters, personal advertisements, seemingly meaningless phrases or coded radio broadcasts. A crossword puzzle provided dozens of words arranged in a format that changed every day, published in a newspaper available to the general public.

British counterintelligence began looking at the man who had supplied the puzzles.

Leonard Dawe was not an obvious German spy. He had been born in 1889, served during the First World War and built a career in education. He was in his mid-50s by 1944 and was responsible for running a school while Britain was at war.

That didn’t make the problem disappear.

According to later accounts, Dawe and fellow Telegraph crossword compiler Melville Jones were questioned by MI5. Investigators wanted to know how these words had entered the puzzles, whether Dawe knew what they meant and whether someone was using the crossword to communicate classified information. Dawe insisted that he had no knowledge of the invasion code words and had not deliberately placed military secrets in his puzzles.

Imagine trying to prove that.

A crossword setter works with words. Over the course of years, thousands upon thousands of words pass through his grids, and many of the D-Day code names had deliberately been chosen because they were ordinary words or place names. Gold, Sword, Mulberry and Neptune could all appear naturally in a crossword without suggesting espionage.

Overlord was harder to shrug off.

Five major D-Day terms appearing in rapid succession was harder still.

But investigators could find no evidence that Leonard Dawe was a spy. There was no secret radio, no German handler and no apparent method by which Dawe could have obtained the operational details necessary to understand what these words represented. The investigation ultimately accepted that the crossword answers had not been part of an espionage operation.

D-Day went forward.

In the early hours of June 6, 1944, paratroopers began dropping behind German defenses in Normandy. Thousands of ships crossed the English Channel, Allied aircraft filled the sky, and troops came ashore on Utah, Omaha, Gold, Juno and Sword. The artificial Mulberry harbors followed, allowing the Allies to unload enormous quantities of supplies without first capturing a major port.

Operation Neptune had begun as the assault phase of Operation Overlord.

The code names in the Daily Telegraph had not prevented the invasion, and there is no evidence that German commanders recognized the crossword answers as leaked Allied terminology. The episode became one of the strange footnotes attached to D-Day – an alarming collection of coincidences investigated by British intelligence and eventually explained away.

Except there was one person who knew they weren’t coincidences.

He was fourteen years old.

And for forty years, he didn’t tell anyone.

In 1984, with the fortieth anniversary of D-Day approaching, a man named Ronald French contacted the Daily Telegraph. French had been a student at Strand School during the war, when Leonard Dawe was the headmaster. He had read accounts of the famous D-Day crossword mystery and realized that the accepted explanation was missing something rather important.

French knew where the words had come from.

Strand School normally operated in London, but the war had forced it to evacuate. The school relocated to Effingham in Surrey, and the area around it became crowded with American and Canadian military personnel preparing for the invasion. Thousands of soldiers were living and training in southern England, and despite strict security rules, military personnel and civilians inevitably crossed paths.

The schoolboys crossed paths with them too.

Ronald French later explained that the boys spent time around the soldiers stationed nearby. The troops talked, the boys listened, and words circulated without the children necessarily understanding what they meant. French became fascinated by the military activity surrounding him and began collecting unusual words he heard.

He wrote them down in a notebook.

This still wouldn’t have put them into a national newspaper except for an unusual part of Leonard Dawe’s crossword-making process. Dawe sometimes brought students into his study while he was constructing puzzles and asked them to fill empty spaces in unfinished crossword grids with words. Dawe could then create clues for some of the words the boys had supplied.

One of those boys was Ronald French.

French had no access to a map showing the Normandy beaches. He wasn’t being handed operational plans by soldiers, and there is no evidence that he understood the military significance of the terms. He was a schoolboy collecting words that sounded unusual or memorable.

Some of those words were Utah, Omaha, Overlord, Mulberry and Neptune.

The words moved through an extraordinary chain. Allied planners assigned ordinary names to classified parts of the invasion. Soldiers preparing for the operation learned those names. Boys living near the soldiers overheard them and repeated them. Ronald French wrote some of them in his notebook and later supplied words while helping his headmaster fill crossword grids.

Leonard Dawe then wrote clues for them.

The crossword puzzles were sent to the Daily Telegraph.

And the Daily Telegraph printed them.

The process didn’t require a spy anywhere in the chain. It required soldiers talking within earshot of civilians, a curious teenager with a notebook, and a headmaster who happened to moonlight as a crossword compiler for one of Britain’s largest newspapers.

French also described what happened after D-Day. Dawe called him into his office and asked him directly where he had obtained the words. French told him about hearing them around the soldiers and showed him the notebooks in which he had written them down.

According to French’s later account, Dawe was horrified.

French remembered Dawe becoming extremely angry and ordering him to burn the notebooks. Dawe lectured him about wartime secrecy and national security, then made him promise not to tell anyone what had happened. French said Dawe went so far as to make him swear on a Bible that he would keep the matter secret.

French kept the promise for decades.

By the time he publicly told the story, he was in his 50s. Leonard Dawe had died years earlier, and the war had long since ended. The explanation finally connected Dawe’s insistence that he had not knowingly inserted secret military terms with the undeniable fact that an extraordinary number of genuine D-Day code words had appeared in his puzzles.

Dawe apparently really hadn’t known what they were.

The boys didn’t fully know either.

The soldiers did.

This wasn’t the only security problem surrounding D-Day. The invasion required so many people, ships, aircraft, vehicles and supplies that absolute secrecy was impossible. The Allies instead relied on compartmentalization, code names and one of the most elaborate deception campaigns of the war to prevent Germany from knowing exactly where and when the attack would come.

Operation Fortitude helped create the impression that the main invasion might strike the Pas-de-Calais, the narrowest part of the English Channel. The Allies used dummy equipment, controlled intelligence leaks, deceptive radio traffic and double agents to reinforce the fiction. General George S. Patton, whom the Germans regarded as one of the Allies’ most aggressive commanders, was publicly associated with a fictitious formation called the First U.S. Army Group.

Meanwhile, genuine preparations in southern England were becoming increasingly difficult to hide from the people who lived there. Roads were crowded with military vehicles. Fields filled with equipment. Soldiers from several Allied countries were living in towns and villages, training for something everyone knew was coming even if they didn’t know precisely where it would happen.

Security breaches could have serious consequences. Major General Henry J. F. Miller, an American officer serving in Britain, reportedly made comments at a party suggesting that the invasion would occur before the middle of June. Eisenhower removed him from his command and sent him back to the United States.

The weather eventually became one of the final determinants of the invasion date. The attack had originally been planned for June 5, but poor conditions forced a 24-hour postponement. Group Captain James Stagg, the chief meteorological adviser to Eisenhower, predicted a brief improvement that would make June 6 possible.

Eisenhower made the decision to go.

The crossword mystery never became an operational disaster because the words by themselves revealed remarkably little. A German intelligence officer would have needed to know that these particular crossword answers were Allied code names, know what each code name represented, and distinguish them from the dozens of unrelated answers surrounding them. There is no evidence that German intelligence made that connection.

The episode also demonstrates why code names aren’t the same thing as encryption. Calling an artificial harbor “Mulberry” hides its meaning only as long as the relationship between the word and the object remains secret. Once someone learns that relationship, saying “Mulberry” can reveal just as much as saying “artificial harbor.”

The planners of Overlord understood that problem and restricted information aggressively. Many soldiers did not know their destinations until shortly before departure, and maps and briefing materials were tightly controlled. But no security system could completely prevent a soldier from saying a word he had been hearing every day.

Especially around children.

Ronald French’s account was eventually incorporated into later histories of the Telegraph crossword incident, although some details of the story depend on recollections made forty years after the event. What is documented beyond dispute is the sequence of crossword answers themselves, the genuine D-Day code names they matched and the security investigation that followed. French supplied the explanation for how those terms could have reached Dawe without Dawe knowingly participating in espionage.

The individual words are still visible in contemporary records. On May 2, Utah appeared. On May 22, Omaha appeared. Overlord followed on May 27, Mulberry on May 30 and Neptune on June 1.

Five days later, men were dying on beaches carrying two of those names.

The Allied landing on June 6 succeeded in establishing a foothold in Normandy, though the cost was enormous. More than 150,000 Allied troops were involved in the initial assault by sea and air, and thousands were killed, wounded or reported missing. The campaign that followed would continue through the summer as Allied forces fought their way through Normandy.

Leonard Dawe continued working in education and constructing crosswords. When the strange pre-invasion puzzles were discussed after the war, the official conclusion remained that there had been no deliberate espionage. That conclusion was essentially correct, even though calling the words a coincidence didn’t explain how so many of them had arrived in the same grids.

Ronald French’s story did.

A fourteen-year-old boy had heard soldiers using words they weren’t supposed to use around him. He wrote the words in a notebook because they sounded interesting. His headmaster needed words for a crossword puzzle.

And five days before D-Day, readers all over Britain could open the Daily Telegraph, look at 15 Down and write NEPTUNE in the boxes. 

A handful of soldiers talked, a fourteen-year-old wrote down what he heard, and some of the most closely guarded words of World War II ended up between the acrosses and downs of a newspaper crossword. It sounds like a wartime spy novel with a ridiculous plot – but the Internet Says It’s True.

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