The expression “Ol Man River” has been in our vernacular as a moniker for the Mississippi River since it was introduced as a song in the Rogers and Hammerstein musical “Showboat” in 1929.  Now whether your memory takes you to Paul Robeson’s unworldly bass vocals in the movie version from 1936, or Chevy Chase’s clip singing to his family as they are crossing the “Mighty Mississip” in National Lampoon’s “Vacation,” will probably be generational.  But the visual I am trying to create actually comes from the duo “Indigo Girls” in [...]