“It is energy, Harry—force. Nothing but energy—and Nature.”
“Then it's not occult?” I asked.
“Certainly it is. I didn't say that. It is what the professor promised. Something concrete for our senses. If the occult is, it can certainly be proven. The professor was right. It is energy, force, vibration. It has a law. The old doctor was caught somehow. We must watch our step and see that we aren't swallowed up also. Perhaps we shall go the way of Watson.”
I shuddered.
“I hope not. But explain. You speak in volumes. Come back to earth.”
“That's easy, Harry. I can give you my theory in a few short words. You've studied physiology, haven't you? Well, that's where you can get your proof—or rather let me say my theory. What is the Blind Spot?”
“In optics?”
“We'll forgo that,” he answered. “I refer to this one.”
I thought for a moment.
“Well,” I said, “I don't know. It was something I couldn't see. Watson went out before our eyes. He was lost.”