Kerby, Fenton, and Bumps are practicing their parts as Liberty Boys in a Bicentennial pageant when their witchy friend Mrs. Graymalkin takes it into her head to expose the featured patriot, the state's first governor, whose stuffed-shirt descendant is running the show. According to Mrs. G. the illustrious governor was a crook, and she broadcasts her message at the height of the gala--in skywriting, special news flash, and a final fireworks ""set piece."" In the end, the hero of the day is not the governor but Kerby's dog Waldo, who, disguised as a raccoon, fetches the telltale 200-year-old Papers from the hands of the censoring descendant and through the library dumbwaiter. Never mind the details--this is one of Mrs. G's sillier tricks--though by now kids might be ready to puncture some Bicentennial bubbles of their own.