If you've perused The Huffington Post Arts & Culture page at all this week, you may have noticed the spread of outsider artists gracing the site. That's because this weekend is the 23rd edition of the Outsider Art Fair, one of the rare and peculiar occasions when the art world gathers to celebrate and explore artists who, by and large, are unaware of the art world's real, prickly existence. Henry Darger, Jenny and Her Sisters are Nearly Run Down by Train..., n.d.