“Both you and your daughter could only have interpreted any such action on my part as instigated by self-interest, for you both knew that I wanted to make her my wife,” replied the other. “My hands were tied. I am sorry now that I did not act, but you can readily see the position in which I was placed.”

“Can nothing be done to get her back?” cried the father. “There must be some way to save her. Do it von Horn, and not only is my daughter yours but my wealth as well—every thing that I possess shall be yours if you will but save her from those frightful creatures.”

“The Ithaca is gone, too,” replied the doctor. “There is only a small boat that I hid in the jungle for some such emergency. It will carry us to Borneo, but what can we four do against five hundred pirates and the dozen monsters you have brought into the world? No, Professor Maxon, I fear there is little hope, though I am willing to give my life in an attempt to save Virginia. You will not forget your promise should we succeed?”

“No, doctor,” replied the old man. “I swear that you shall have Virginia as your wife, and all my property shall be made over to you if she is rescued.”

Sing Lee had been a silent listener to this strange conversation. An odd look came into his slant eyes as he heard von Horn exact a confirmation from the professor, but what passed in his shrewd mind only he could say.

It was too late to attempt to make a start that day for Borneo, as darkness had already fallen. Professor Maxon and von Horn walked over to the workshop and the inner campong to ascertain what damage had been done there.

On their return Sing was setting the table on the verandah for the evening meal. The two men were talking, and without making his presence noticeable the Chinaman hovered about ever within ear shot.

“I cannot make it out, von Horn,” Professor Maxon was saying. “Not a board broken, and the doors both apparently opened intentionally by someone familiar with locks and bolts. Who could have done it?”

“You forget Number Thirteen,” suggested the doctor.

“But the chest!” expostulated the other. “What in the world would he want of that enormous and heavy chest?”