“Still coming straight on. Same direction. Same height. Seems as if I should see them.”

“But you can’t.”

“They’re close now. Get ready. Same direction. Same—Fire!” Her voice rose to a scream. Her wind-blown hair was in a mad tangle, her face lit as by a flame.

The big pom pom gun roared.

“Again!” Once more the gun spoke. “Again! Again! Again!”

Something was happening up there in the sky. The exploding shells boomed, while in between the sound of oncoming planes became more and more confused.

“They’re almost over us.” Mac glanced at the air shelter.

“We can’t stop yet. Once more,” she pleaded.

Once again the gun spoke.

Next instant, as if caught by a whirlwind, Gale was seized from behind and sent through such a dizzy circle that she had no notion where she was going until she landed on the floor of the air raid shelter.