The obsolescence of the gunfighter. The free-ranging cowboy fenced off by barbed wire. Horses replaced by automobiles. The land of limitless possibility and moral certitude, subdivided and spoiled by industrialization. Once-heroic figures ride slowly into the sunset, or are killed, their qualities unrecognized, perhaps even willfully rejected, by those who come after. Autumn comes to the Old West, this Friday at 6 pm.