"Fire! Fire!"

She was momentarily stunned. Then, realizing that she was trapped in a burning building, she struggled desperately to free herself. She kicked with all her strength against the floor and walls of the closet. Finally, she succeeded in loosening her gag.

"Help! Help!" she screamed.

Her voice sounded muffled and weak. The top floor was without tenants, and Penny knew that the chance of anyone hearing her was very slight. She was doomed to a horrible fate.

Her courage failed her for the moment and she sobbed in terror. But she soon had herself in check again and was struggling to free herself. It seemed to her that the cords which held her wrists were a trifle looser—she worked at the knots with her teeth.

From below she heard a loud clanging, and the shrill whistle of a fire siren. New hope surged over her. Perhaps the firemen who had arrived upon the scene would reach her in time!

"Even if they shoot a ladder up to the window they'll never think anyone could be tied up in the closet," she reasoned. "If I'm to escape, it will be from my own efforts."

Penny knew that the fire was rapidly spreading, for she could hear a steady roar which rapidly grew louder. The closet was so warm that she found difficulty in breathing. She could plainly smell smoke.

Then suddenly, almost when she had given up hope, she was free. Her wrists were bruised and bleeding but that was of no consequence. It required only an instant to untie the cords which bound her ankles.

A new fear assailed her. The closet door might be locked!