Timothy

In 1971, a Pennsylvania band named the Buoys had a top twenty hit with a little song called "Timothy".  I remember playing the song on the radio, and slowly realizing it was about three miners trapped underground and how two of the miners survive by eating the third... poor Timothy.  The unusual theme made it tough for the Buoys to have a successful follow-up and they faded away.  But their #17 hit remains the only song I remember about cannibalism, and is a true forgotten oldie.
listen here