Some 15 miles off the coast of Devonshire, the super-submarine M-1 floundered suddenly and inexplicably, sank down and down, with all hands on board, to depths at which the Admiralty announced that she must have been crushed like an eggshell by hydraulic pressure.
For several days minesweepers searched vainly for the sunken vessel, plowed futilely back and forth through choppy rising seas. The Admiralty sent out divers and ships equipped with a recently and secretly developed instrument for magnetically detecting sunken masses of iron. The sea bottom was explored by every possible means. Then...
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