Saloon-keepers and street preachers, gypsies and steel-walking Mohawks, a bearded lady and a 93-year-old "seafoodetarian" who believes his specialized diet will keep him alive for another two decades. These are among the people that Joseph Mitchell immortalized in his reportage for The New Yorker and in four books-- McSorley's Wonderful Saloon , Old Mr. Flood , The Bottom of the Harbor , and Joe Gould's Secret --that are still renowned for their precise,...