The name behind the face, however, has long been something of a mystery. People polled throughout the United States have guessed that the Gerber Baby grew up to be Humphrey Bogart, Elizabeth Taylor and even Bob Dole. But Ann Turner Cook, mystery novelist and retired English teacher, knows the real answer. She was the subject of a simple charcoal sketch by Dorothy Hope Smith, an artist who specialized in drawing children. In 1928, Gerber was seeking a baby face for the ad campaign introducing its newly developed baby food. Smith submitted her drawing amid elaborate oil paintings and said...