"Her heart's beating," whispered the doctor, feeling the child's pulse. "Slow but steady. She'll regain consciousness any moment now."

"No time to wait." Disregarding June's cry of protest Jack stripped off the electrodes. "We must get the big machine working."

"But the little thing will die again," cried June, throwing herself on her knees beside the tot. "I didn't think you could be so cruel."

"Solinski has cut off our drug supply," explained Manthis gently. "He's operating the other station. Don't blame Jack. We must work fast."

"You mean that Russian is responsible for all this?"

"Yes, child. But maybe we can defeat him yet. Don't lose courage. Now I must go and prepare what's left of the drug. We're overdue for it now."

Meanwhile Jack was busy running leads from the generator room, connecting banks of tubes, stringing an aerial on the terrace.

"Twelve hours! Twelve hours!" he muttered. "Just time to make it if the doctor's calculations are correct. June, hand me those pliers, but be careful of the wires. I haven't time to insulate them. When we start the dynamo they'll be carrying twelve thousand volts."

"But won't Solinski and his men come back and kill us?" For the first time the full weight of despair descended upon her brave spirit.

"Probably. Does your father have a revolver?"