After numerous attempts to restore the fountain, Merlin tries one last enchantment, and when it also fails, he claims that the fountain is cursed forever.
The Yankee claims that a "spirit with a Russian name" has cursed the well, but claims he might be able to break it. He needs the area around the fountain cleared until he's finished.
Merlin, in an attempt to peg the Yankee down, asks him if he knows the spirit's name. The Yankee says that he does; Merlin then claims that uttering the name of the spirit would kill him.
The Yankee's assistants arrive, bringing with them pumps, fireworks, and other equipment.
They repair the leak and set the pump, then prepare the fireworks… as well as a platform for witnesses to watch the miracle. You can't have a miracle without witnesses, right? Otherwise what's the point?
A crowd gathers—including Merlin and the old abbot—and the Yankee utters a series of nonsense words while touching off his fireworks.
The last word is supposedly the name of the evil spirit.
The water begins to flow from the fountain again.
Merlin is convinced that the Yankee is a sorcerer, and claims that he never heard the name of the spirit pronounced so well. (He's, um, lying.)