Ms. Stephens Says Ornate Coiffures Weren't Wigs After All; The Vestal Virgin ChallengeBy day, Janet Stephens is a hairdresser at a Baltimore salon, trimming bobs and wispy bangs. By night she dwells in a different world. At home in her basement, with a mannequin head, she meticulously re-creates the hairstyles of ancient Rome and Greece. Ms. Stephens is a hairdo archaeologist. Her amateur scholarship is sticking a pin in the long-held assumptions among historians about the complicated, gravity-defying styles of ancient times. Basically, she has set out to prove that the ancients probably weren't wearing wigs after all. "This is...