A delightful story that illustrates the mail delivery system for Great Lakes freighters. In the port city of Manistee on the coast of Lake Michigan lives a girl named Mary. Mary's father is a sailor who works on a lake freighter called the Big Laker. The Big Laker delivers iron, stone, and coal to the many cities along the Great Lakes. Mary's father will not be home this year for his birthday and Mary wants to send him a card. But...