Definitely the most talented and arguably the all-around best jazz vocal group of all time, the Boswell Sisters parlayed their New Orleans upbringing into a swinging delivery that featured not only impossibly close harmonies, but countless maneuvers of vocal gymnastics rarely equaled on record. Connee (sometimes Connie), Helvetia (Vet), and Martha Boswell grew up singing together, soaking up Southern gospel and blues through close contact with the Black community. They first performed at vaudeville houses around the New Orleans area, and began appearing on local radio by 1925....