Aunt Mary and her niece, Peggy Douglas, had driven into Wakefield quite early this morning hoping to get their errands done by lunchtime. Peggy had stopped off at the library to pick up a library book for Jane Plumber. Now with her shopping list all checked off, the bundles stowed neatly away in the back of the truck, Aunt Mary had just pulled into the driveway of the gas station, before she noticed the big black car, which belonged to Ben Calvert...