“But, Dr. Klauss,” said Mr. Sheldon, endeavoring to speak calmly, “please consider——”

“No! I will consider nothing! Here you are—and here you will remain—aboard my submarine. I did not ask you to come—I did not want you. I am a monster, perhaps—a monster when I think of my wrongs; but I could not leave you to drown. You owe me a debt for saving your lives.

“Very well! You will pay that debt by never seeing your own country again. I have you—I shall keep you!” and his voice rose to a scream as, clapping his hands together, he rushed from the cabin.


[CHAPTER XXI]
PLOTTING

With fear in their hearts the refugees stared at one another. Grace Sheldon shrank close to her father, who silently patted her shoulder.

“There, there, Grace,” he said, soothingly, “I dare say we shall find a way out of this. Don’t worry.”

“But, Papa, I can’t help it,” she replied in tremulous tones. “He—I’m afraid—yes, I’m sure he’s insane—Dr. Klauss is certainly insane.”

Mr. Sheldon looked at Jerry and his chums.