Pigpen. Good old Pigpen! He is one of the longest-lived characters in the Peanuts series, having first appeared July 13, 1954.
The poor kid! Whenever he tries to clean up (and he does, on occasion,) he is at first unrecognizable, but then, almost immediately, reemersed in the dust and earth of his environment. On November 27, 1959, Charlie Brown and Violet comment on Pigpen as he walks by. Charlie Brown notes that, "He may be carrying soil that was trod upon by Solomon or Nebuchadnezzar or Genghis Khan." Pigpen amazed at this observation, makes the exclamation that is this cache's title.
Coordinates are not the real ones. That makes it tough, I know, but perhaps this little story will make you feel better. (Click the dust pile.)
You are looking for a very unique cache container! I don't think I've ever come across one of these. You may also find the log a little difficult to get to, but let me assure you that it is entirely possible--indeed, it's part of the challenge--to extract the log without any special tools and, of course, without damaging the cache container. The cache is on the roadside of private property (the site of real pig pens!) and has been placed with the kind permission of the owner.
You can check your answers for this puzzle on Geochecker.com.