An article entitled, "Twain on the Grand Tour," by Gore Vidal, appears in the May 23, 1996 issue of _The New York Review_. The article will serve as Vidal's preface to _Following the Equator and Anti-Imperialist Essays_ (including "To the Person Sitting in Darkness" and "King Leopold's Soliloquy",) which will appear as one of the volumes of The Oxford Mark Twain, edited by Shelley Fisher Fishkin, and to be published later this year by Oxford University Press.