The old man became silent. He was speculating upon something. Harry did not disturb his thoughts, although he wondered what new surprise might be in store.
“This island is a strange place,” remarked Professor Whitburn. “A strange place, with a bad reputation. That is why I chose the place.
“I like to be alone — assisted only by those whom I have chosen to help me in my labors. In a place like this, I am left alone.
“I am a man with great vision” — the professor’s voice became less raspy, and his eyes seemed to glow in reminiscence — “but few have been able to appreciate it. One man became interested in my plans; but I would not work for him, until he made me financially independent.
“Even then, the desire for material gain dominated him. He constantly annoyed me, demanding action and results. Now he is dead, for which I am truly sorry; but it has left me free to develop my work without troublesome interruption.
“I have chosen rather unusual men to be here with me. They know how to keep silence. They do not talk — even among themselves. They realize that reward lies in the future; but they devote their efforts to the present. Are you willing to do the same?”
“The present always interests me more than the future,” replied Harry.
“Good! Then you shall work for me,” said the professor. “But wait — there is one more point. Your work will involve danger. Will you assume it at your own risk?”
“Certainly.”
“The reason that I ask,” said Professor Whitburn, in warning tones, “is because two men have died in my service. They suffered because of their own carelessness. I was able to prove that fact.