British dandy and self-taught expert in criminality Sebastian Horsley was stopped at JFK on his way into our country for his book party yesterday, and sent right back home to London, as we learned last night. But! The party must go on. A Harper-Collins rep informed us the party for Horsley's Dandy in the Underworld is still on for tonight, at Housing Works. Only now, as the attached invite shows, it's a "LET SEBASTIAN IN RALLY." We think we've got just about enough book-releasing dandies, thank you very much, but hell, what's one more.