The Adventures Of Tintin Secret: Of The Unicorn Serial Number

Tintin’s heart raced. “Chart?”

Haddock looked at Tintin, his eyes wet. “All that trouble. All that danger. For… justice.”

The real treasure was the truth.

The next morning, he visited Professor Calculus. The half-deaf genius was calibrating a new ultrasonic depth-finder. “Calculus, does ‘UN-7’ mean anything in naval history?” The Adventures Of Tintin Secret Of The Unicorn Serial Number

Tintin lifted it. The hull slid open.

Behind it, a fissure in the cliff.

And as the tide began to rise, washing away their footprints, the secret of the Unicorn —hidden for three centuries by a single, humble serial number—was finally safe. Tintin’s heart raced

“Blistering barnacles!” Haddock bellowed. “The drowned church! That’s off the coast of Cornwall—St. Piran’s Old Chapel, swallowed by the sea three hundred years ago!”

Captain Haddock opened it with trembling hands. It was Sir Francis’s final testament—not a treasure map, but a confession. The Unicorn had been carrying not plunder, but a treaty that would have ended a secret war between two kingdoms. The ship was sunk not by pirates, but by a traitor in the Royal Navy. The three parchments were a decoy to mislead the traitor’s descendants.

Inside was not gold. It was a leather-bound folio. The true secret of the Unicorn . All that danger

“During Sir Francis’s time,” Calculus said, tapping a page, “the crown allowed private shipyards to use a code. ‘U’ stood for ‘Unicorn-class’—a fast frigate with a shallow draught. And the number…” He pushed his spectacles up. “The number was not the hull number. It was the chart number .”

Tintin carefully removed the stern section. Inside the cavity where the rudder chain ran, he found not parchment, but a tiny brass cylinder, sealed with wax. He cracked it open.