Short summary of Jack Pumpkinhead of Oz story:
Remembering his previous visit to Oz, Peter (from The Gnome King of Oz) finds himself in Jack Pumpkinhead's yard. The two set off for the Emerald City, but take a wrong turn and end up in the Quadling Country, where they meet products of Mogodore, Red Baron of Baffleburg's plot to conquer Oz and marry Ozma, including Belfaygor of Bourne, with his beard cursed to rapid growth, and Snif the Iffin, a griffin who has lost his "grr."