"Your eyes are setting foot where man has never been before, at least not for a very long time." Roger Tomlin, about looking at Roman inscriptions from the first decade of London's existence. (http://www.ksl.com/?sid=40012114&nid=235&title=2000-year-old-handwritten-documents-found-in-london-mud)
Because eyes have feet.
And because man has never been where he wrote things down.