The Cyclops was nearly 550 feet long, with a crew of 306 people and around 11,000 tons of manganese aboard. She had been sailing successfully since 1910, traveling between the Baltic Sea, the Caribbean and Mexico and assisting with moving coal around the world and helping refugees. But in 1917, when America entered World War I, Cyclops became a key naval asset, transporting troops and coal to fuel other ships all over the world.

In March 1918, the ship was given a new cargo: tons of dense manganese ore, used in steelmaking. She left Brazil loaded up with the brittle metal, then voyaged to Barbados to resupply for the long journey home to Baltimore. The last known message from the ship said simply: “Weather Fair, All Well.” But on the nine-day journey, something went awry, and no one from the ship was ever seen or heard again—vanishing without even an SOS.

In a feature published a couple of years after the ship’s disappearance, ‘Santa Fe Magazine’ described the strangeness of the disappearance: “Usually a wooden bucket or a cork life preserver identified as belonging to a lost ship is picked up after a wreck, but not so with the Cyclops,” they reported. “She just disappeared as though some gigantic monster of the sea had grabbed her, men and all, and sent her into the depths of the ocean, and the suddenness of her destruction is amplified by the absence of any wireless calls for help being picked up by any ship along the route.”

Her disappearance remains a mystery.

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