When the Porters Died
  Some facts fail to register the first time.  Later, you encounter them again and your world tilts on its access.  Try this one on for size: porters died out in Britain.  Absolutely and utterly.  Kaput.  Apparently Jackson, writing about them in the 70s, was doing forensic work.  Given porter's near-ubiquity in American brewpubs, I would say the style is in no immediate danger of re-extinction. On the other hand, it makes me hopeful for gose.