Owen Wister is known to most Americans as the creator of the heroic cowboy in The Virginian (1902). Despite his success as a Western novelist, Wister's failure to write about his native city of Philadelphia has been lamented by many for the loss of a literary "might-have-been." If only, sighed Wister's contemporary Elizabeth Robins Pennell in 1914, the novelist could understand that Philadelphia was as good a subject as the Wild West. Hence the surprise when James Butler uncovered a substantial fragment of a Philadelphia novel, which Wister intended to call Romney. Here,...