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The American Dentist Who Drilled a Secret Message on Tojo's Dentures

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After his country surrendered to the United States in 1945, former Japanese Prime Minister Hideki Tojo had a pretty rough go of things. A failed suicide attempt left his stomach mangled (he tried to shoot himself in the heart but missed), and he had to recover in a Tokyo jail while he awaited trial for war crimes. While imprisoned, he became the butt of a prank that left a secret message drilled into his top set of false teeth, right at the tip of his tongue: "Remember Pearl Harbor."

The message was put there by a 22-year-old dental prosthetics officer with the U.S. Navy named Jack Mallory. Mallory was assigned to the 361st Station Hospital in Tokyo, which was responsible for nearby Sugamo Prison where Tojo was being held. Just one month after arriving in Japan in 1946, Mallory was handed a stupefying assignment: The architect of Japan’s war against the U.S. needed dentures, and Mallory was to make them for him.

Jack Mallory and his roommate, a dentist by the name of George Foster, were called to Sugamo Prison to examine Tojo, whose teeth were decaying and crumbling from his gums. “I knew I was going to meet an evil man," Mallory told Sierra Countis of the Chico News & Review in 2002. “It was a shock to see him. He was very humble and just a meek, little guy.”

Tojo had requested the dentures so he could speak for himself at his upcoming trial. He knew his execution was a foregone conclusion, so when Mallory suggested he get a full set of false teeth, Tojo declined and asked only for the top row—he wouldn’t be needing them for long and didn’t want to waste anybody's time.

Word of the assignment got out, and Mallory’s colleagues at the hospital egged him on to use the opportunity to pull off a legendary prank. He wanted to inscribe "Remember Pearl Harbor" on the dentures but knew such a conspicuous message would be caught easily. He decided to use Morse code instead, so he drilled the sentence into the row of false teeth as a series of dots and dashes.

Mallory and Foster always referred to it as a “prank” and not much more. “I figured it was my duty to carry out the assignment,” Foster recalled in 1988. “But that didn’t mean I couldn’t have fun with it.”

“It wasn’t anything done in anger,” Mallory told the AP in 1995. “It’s just that not many people had the chance to get those words into his mouth.”

The prank was meant to be kept secret, though news got out after someone at the dental service blabbed about it in a letter home, where the story traveled so fast that it even found its way onto a Texas radio broadcast.

With news of the deed now bouncing back to and around Tokyo, Mallory confessed to his supervisor before things could get more out of hand. “That’s funny as hell," Mallory recalled being told, "but we could get our asses kicked for doing it.” His supervisor ordered the men to undo their prank immediately.

Late one evening in February 1947—some three months after first inscribing "Remember Pearl Harbor" in Morse code into the false teeth—Mallory and Foster paid a visit to Tojo’s cell and asked the guard to wake him up. They needed to perform emergency work on his dentures, they said, and Mallory swiftly and discretely ground the hidden message off Tojo’s teeth. All reports indicate Tojo never knew it was ever there.

The next morning, a supremely pissed-off and high-ranking colonel called on Mallory and Foster to ask about the prank. With the evidence inside Tojo's mouth ground and sluiced away, the young dentists were able to soundly deny everything.

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Jack Mallory returned to the United States in 1947 and set up a dental practice in California that he ran for decades. Before he left Tokyo, however, he spent a day sitting in on Hideki Tojo’s trial. As Mallory recalled to the Chico News & Review, his former patient recognized him inside the courtroom, smiled, "pointed to his teeth and bowed toward him in thanks."

Tojo was able to speak for himself at his trial and took responsibility for Japan's actions during the war. He was found guilty and was hanged on December 23, 1948.

Jack Mallory passed away in 2013 at the age of 88. His online obituary includes stories of skiing and other outdoor adventures, plus a quick, vague aside about a "dental prank" performed on Hideki Tojo, "the 'mastermind' behind the attack of Pearl Harbor."

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Scientists Reveal Long-Hidden Text in Alexander Hamilton Letter
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Age, deterioration, and water damage are just a few of the reasons historians can be short on information that was once readily available on paper. Sometimes, it’s simply a case of missing pages. Other times, researchers can see “lost” text right under their noses.

One example: a letter written by Alexander Hamilton to his future wife, Elizabeth Schuyler, on September 6, 1780. On the surface, it looked very much like a rant about a Revolutionary War skirmish in Camden, South Carolina. But Hamilton scholars were excited by the 14 lines of writing in the first paragraph that had been crossed out. If they could be read, they might reveal some new dimension to one of the better-known Founding Fathers.

Using the practice of multispectral imaging—sometimes called hyperspectral imaging—conservationists at the Library of Congress were recently able to shine a new light on what someone had attempted to scrub out. In multispectral imaging, different wavelengths of light are “bounced” off the paper to reveal (or hide) different ink pigments. By examining a document through these different wavelengths, investigators can tune in to faded or obscured handwriting and make it visible to the naked eye.

A hyperspectral image of Alexander Hamilton's handwriting
Hyperspectral imaging of Hamilton's handwriting, from being obscured (top) to isolated and revealed (bottom).
Library of Congress

The text revealed a more emotional and romantic side to Hamilton, who had used the lines to woo Elizabeth. Technicians uncovered most of what he had written, with words in brackets still obscured and inferred:

Do you know my sensations when I see the
sweet characters from your hand? Yes you do,
by comparing [them] with your [own]
for my Betsey [loves] me and is [acquainted]
with all the joys of fondness. [Would] you
[exchange] them my dear for any other worthy
blessings? Is there any thing you would put
in competition[,] with one glowing [kiss] of
[unreadable], anticipate the delights we [unreadable]
in the unrestrained intercourses of wedded love,
and bet your heart joins mine in [fervent]
[wishes] to heaven that [all obstacles] and [interruptions]
May [be] speedily [removed].

Hamilton and Elizabeth Schuyler married on December 14, 1780. So why did Hamilton try and hide such romantic words during or after their courtship? He probably didn’t. Historians believe that his son, John Church Hamilton, crossed them out before publishing the letter as a part of a book of his father’s correspondence. He may have considered the passage a little too sexy for mass consumption.

[h/t Library of Congress]

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7 of History’s Most Unusual Riots
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Scott Barbour/Getty Images

Some sociologists theorize that most rioters only join a crowd because the crowd is big enough to justify joining. But there’s always that one person who sparks the violence, and sometimes the reason for doing so can seem pretty baffling. Maybe a work of art scandalizes its audience, like the famous premiere of Igor Stravinsky’s The Rite of Spring. Or maybe it’s simply a notable act of disrespect, like history’s first recorded mooning (in Jerusalem in the first century CE). From balloonists to brown dogs to daylight saving time, here are seven weird reasons things just got out of hand.

1. THE MELBOURNE DART RIOT

The Darts Invitational Challenge, an international tournament held in Melbourne, attracted international gawking in January 2015 during the finals match between Michael "Mighty Mike" van Gerwen and Simon "The Wizard" Whitlock. The dart players weren’t making a scene, though: Rather, hundreds of spectators, many of them drunk and in costume, began throwing plastic chairs as they watched (pictured above). The reasons for the fight remain unclear; footage and photos show police trying to control adults dressed as Oompa-Loompas, numerous superheroes, and, in one instance, in a ghillie suit (heavy camouflage meant to resemble foliage).

2. THE LEICESTER BALLOON RIOT

In 1864, balloonists were the great daredevils of their time, and a major draw for eager audiences. That summer, Henry Coxwell, a famous professional aeronaut, was set to make an appearance for 50,000 paying ticketholders in Leicester, England. Unfortunately, a rumor spread that he hadn’t brought his biggest and best balloon to the event. After heckling from the crowd, Coxwell deflated his balloon, and attendees rushed it, ripping it to shreds, setting it on fire, and threatening to visit the same fate on Coxwell. Rioters even paraded the remains of the balloon through the streets of town, which briefly brought residents a new nickname: Balloonatics.

3. THE TORONTO CLOWN AND FIREFIGHTER RIOT

Toronto was still a pretty rough place in the 1850s, but not so rough that the circus wouldn’t come to town. As it turns out, circus entertainers were also a tough lot back then, so when a group of off-duty clowns spent an evening at a brothel popular with the city’s firefighters on July 12, 1855, tensions came to a head. Accounts differ as to who started the fight, but after one firefighter knocked the hat off a clown things escalated into a full-on rabble intent on chasing the circus out of town. Only the mayor calling in the militia put an end to the uproar, an incident Torontonians credit with kicking off much-needed local police reforms.

4. THE BELGIAN NIGHT AT THE OPERA RIOT

A painting by Charles Soubre of the Belgian Revolution
Charles Soubre, Wikimedia Commons // Public Domain

Not many nations can claim their independence started with an aria, but for 19th-century Belgians sick of living under Dutch rule, an opera was just the right fuse for a revolution. To honor the birthday of King William I of the Netherlands, a theater in Brussels put on La Muette de Portici, about an uprising in Naples against Spanish rule. One song, "Amour Sacre de la Patrie" ("Sacred Love of the Fatherland"), aroused nationalistic passions so much that after the opera ended, the crowd began destroying factories and occupying government buildings. That was August 25, 1830; Belgium declared independence on October 4.

5. THE NEW YORK DOCTORS' RIOT

Hamilton fans, take note: Everyone’s favorite Founding Father once tried to quiet a mob bent on burning corpses. For centuries, anatomists and medical students relied on gruesome means to learn about the human body. Cadavers for dissection class often came from grave robbers, since the corpses of executed criminals were the only legal source—and they were in limited supply. In New York in 1788, rumors abounded that medical students were digging up paupers’ graves and black cemeteries. When one mob came after the doctors responsible, Alexander Hamilton tried, and failed, to restore the peace. The crowd swelled to about 5000 before militiamen intervened, leading to up to about 20 deaths.

6. THE BROWN DOG RIOTS

Photo of an anti-vivisection demonstration in Trafalgar Square, London, to protest the removal from Battersea Park of the Brown Dog statue
The Anti-Vivisection Review, Wikimedia Commons // Public Domain

Riots against the dissection of dead human bodies were not rare in the United States at one time. But on December 10, 1907, a thousand Britons marched in support of vivisection, or surgery on live animals. At the center of the controversy was a small terrier allegedly vivisected without anesthetic in 1903 during a class at London’s University College. Animal rights activists erected a statue to the dog in 1906, which enraged area medical students, and protesters tried to destroy the statue using crowbars and hammers. For the 1907 march, 400 mounted police were deployed to contain marchers. The statue became such a flashpoint (and an expense to local authorities) that in 1910, it was removed and melted down.

7. THE EEL-PULLING RIOT

Palingtrekken (eel-pulling) was once a popular contest in Amsterdam, in which a writhing eel was suspended over a canal and hopefuls on boats would leap to snatch it as they passed beneath (usually landing in the water instead). However, “eel-pulling” was also illegal—the government deemed it a “cruel popular entertainment”—and in July 1886, police intervened at a particularly large gathering in the city’s Jordaan district. Civilians threw stones and bricks at police, and when some nearby socialist protestors joined them, a riot broke out that lasted for several days. The army finally intervened and opened fire on the protestors. All in all, 26 people died and 136 were wounded, but somehow, the eel itself at the center of the riots was allegedly saved and auctioned off in 1913.

A version of this story originally ran in 2015.

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