John Tommy Fiddich's vegetable garden is wiped out by hail, leaving nothing but a large stone. He learns that Sir Henry M. Pellatt will pay one silver dollar for each dull colored stone accepted for building his castle wall. The effort involved in moving it makes the stone worth a lot to him, and eventually to Sir Henry as well.
Includes information about the varieties of stone, how it can be carved, its endurance when used in buildings and walls, and chemicals which come from it.