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The March number explains an ingenious holocryptic cipher, written with the English alphabet, with no more letters than would be required for ordinary writing, yet so curiously complicated, that, while with the key easy to understand, it is without the key absolutely undecipherible, even to the inventor of the plan; and the key is capable of so many variations, that every pair of correspondents in Christendom may have their own cipher practically different from all others.
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