Joe, Samantha, and David seek help from Ellen (Joe's mother), and neighbor Wanda, who is leader of the local historical society, in the mystery of the man digging up the unknown grave in the park; Wishbone continues as Tom Sawyer.
Did You Know?
[about finding buried treasure
What do your books say?
Well, sometimes it's buried on islands, but mostly it's buried under the floorboards in haunted houses.
Who hides it?
Robbers! Who do you think, schoolteachers?