The rain was now beating down on the big top in a deluge, and despite the ringmaster's assurance that the canvas would not leak, a fine spray was filling the tent like a thin fog, through which the lights glowed in pale circles.

"Even the lamps have halos," Teddy informed the people. "I had one once, but the ringmaster borrowed it and forgot to return it. But I don't care. He needs a halo more than I do."

A howl greeted this sally.

Teddy was about to say something else, after the first wave of laughter had swept over the audience, but no one heard him speak.

Another flash, more brilliant, more blinding than any that had gone before it, lighted up the tent. The big top seemed suddenly to have been filled with fire. Thin threads of it ran down quarter and center pole; circles of it raced about the iron rings used in various parts of the tent, then jumped into the rigging, running up and down the iron braces and wire ropes used to brace the apparatus.

The flash was accompanied by a report that was terrifying. At that instant a great ball of fire descended from the damp top of the tent, dropping straight toward the concourse. Teddy Tucker chanced to be standing just beneath it. He had glanced up when the report came, to see if any damage had been done aloft.

"Wow!" breathed Teddy.

Just then the ball burst only a few feet above his head, scattering fire in all directions.

Teddy fell flat to the ground.

He was up almost at once.