"What can I do for her, Father?" June cried, turning away from the officer in despair. "She's dying. See? Couldn't we give her some of the drug?"

"There's only enough for us," her father replied firmly.

"But she'll be quite dead in an hour!"

"I'm not so sure of that. Perhaps only in a state resembling catalepsy. We must wait. Jack, take her into the lobby. Put her on a sofa there."

Dawn was paling the blue-black sky as the radio engineer returned. The street lights fluttered fitfully and at last died. The streets had become deserted although groups still eddied slowly about the subway kiosks.

"Five forty-five," whispered Manthis. "The end should come any moment."

As he spoke a white-garbed street sweeper, who had been leaning on his broom at the curb ever since the onlookers had reached the sidewalk, decided to move on at last. With infinite slowness his foot came up. He poised, swung forward, then, the universal paralysis overcoming him, remained in a strangely ludicrous position for a moment before crashing downward on his face.

As far as they could see in the semidarkness, others were falling. A few, balanced with feet wide apart, remained standing like statues. Those who collapsed writhed slowly a time or two and were still.

After the thudding of the bodies had ended the silence became ghastly. Not an awakening bird twittered in the trees of Central Park. Not a sheep bleated in the inclosure. Except for their own breathing and the sighing of the wind, not a sound! Then a faraway clock boomed six notes. The noise made them start and turn pale faces toward each other.

"Come," said the doctor heavily. "It's all over. We might as well go up. We'll have to walk. All power will be off. Twenty stories!"