It seemed several hours to Tom that he pounded out that cry for aid, but, as he afterward learned, it was only a little over an hour. Signal after signal he sent vibrating from the steel sides of the tank. When one arm tired he would use the other. He grew weary, his head was aching, and there was a ringing in his ears; a ringing that seemed as if ten thousand bells were jangling out their peals, and he could barely distinguish his own pounding.
Signal after signal he sounded. It was becoming like a dream to him, when suddenly, as he paused for a rest, he heard his name called faintly, as if far away.
"Tom! Tom! Where are you?"
It was the voice of Mr. Sharp. Then followed the tones of the aged inventor.
"My poor boy! Tom, are you still alive?"
"Yes, dad! In the starboard tank!" the lad gasped out, and then he lost his senses. When he revived he was lying on a pile of bagging in the submarine shop, and his father and the aeronaut were bending over him.
"Are you all right, Tom?" asked Mr. Swift.
"Yes—I—I guess so," was the hesitating answer. "Yes," the lad added, as the fresh air cleared his head. "I'll be all right pretty soon. Have you seen Andy Foger?"
