From the Walt Disney corporation to Wall street............how Lo can a cracker go???????????  Follow one of them to the center of the Earth...........i can guarantee u it is farther than 12 feet............man oh man.........


    two fathoms
    "Mark Twain" (meaning "Mark number two") was a Mississippi River term: the second mark on the line that measured depth signified two fathoms, or twelve feet—safe depth for the steamboat. In 1857, at the age of twenty-one, he became a "cub" steamboat pilot.

    Mark Twain at Large: The Mississippi River

    bancroft.berkeley.edu/.../mississippi.html
    University of California, Berkeley

Depth sounding - Wikipedia, the free encyclopedia

https://en.wikipedia.org/wiki/Depth_sounding
Wikipedia
Thus when the depth was two fathoms, they would call "by the mark twain!". The American writer Mark Twain, a former river pilot, likely took his pen name from this cry. The term lives on in today's world in echo sounding, the technique of using sonar to measure depth.
Terminology - ‎History - ‎See also - ‎References

W

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