On June 24, 1911, a customs officer patrolling the beaches between Maguelone and Palavas in southern France made a peculiar discovery: a half-liter white glass bottle, carefully sealed, containing a handwritten note. The message claimed to be from Lieutenant Bague, a French aviator who had disappeared on June 5, 1911, while attempting to fly from Nice to Tunis. According to the note, Bague's death was caused by a "backfire in the left wing of the carburetor." But is this note authentic, or is it a cruel hoax? The story raises questions that resonate even today for ATPL and ATC students. Lieutenant Bague had taken off from Nice in a monoplane, planning to hop via Corsica, Sardinia, and Sicily before reaching Tunis. He never arrived. His disappearance was a mystery—no wreckage, no trace. The bottle note, if genuine, would be the only clue. However, aviation historians and experts have long doubted its authenticity. The technical details about the crash are questionable: carburetors in 1911 were simple devices, and a "backfire in the left wing" is not a standard failure description. Moreover, the bottle was found near Montpellier, hundreds of kilometers from Bague's intended route over the Mediterranean. The note seems more like a cruel prank than a genuine distress message. For ATPL and ATC students, this historical case offers a powerful lesson in accident investigation and the importance of reliable evidence. Modern aviation relies on rigorous data—flight recorders, radar tracks, and maintenance logs—to determine the cause of incidents. The Bague case shows what happens when such systems are absent: speculation and hoaxes fill the void. It also highlights the need for clear communication in emergencies. If Bague had been able to send a radio message or if ground stations had tracked his flight, the mystery might have been solved. Today, students learn about the critical role of communication protocols and the value of primary sources in safety investigations. In conclusion, the bottle note of 1911 remains an intriguing but unverified piece of aviation lore. It reminds us that aviation safety has come a long way, but also that every detail matters—whether it's a carburetor design or a flight plan. For those training to become pilots or controllers, this story underscores the importance of skepticism, thorough analysis, and the relentless pursuit of truth in the skies.