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BaddeleyBrothersEnvelopeCutting

July 24, 2013
by the gentle author

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  1. William Martin permalink
    October 25, 2021

    Envelope cutting is related to the new science of letter locking, developed by an MIT librarian. Letter locking is the process by which letters to be sent are made unreadable to the casual handler. See e.g., https://www.youtube.com/watch?v=W9IQP93tzFU

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