It exists! The long-lost letter from Neal Cassady that inspired Jack Kerouac to write On the Road will be auctioned next month at Christies, ending an 18-month-long battle over its ownership and another 60-year-long battle over its existence. As Kerouac said, “It was the greatest piece of writing I ever saw, better’n anybody in America, or at least enough to make Melville, Twain, Dreiser, Wolfe, I dunno who, spin in their graves.”