The cause of the disease I showed to lie in an abnormal action of the brain, which is the storehouse of the phantasms or brain-pictures. And this abnormal action may itself proceed either from a local lesion of the brain, or from a sympathetic affection due to indisposition in other parts of the human body.
You may have had occasion to notice the process in the case of a man who is becoming intoxicated and then passes on to mania or delirium tremens: he gradually proceeds to mix up brain-pictures with realities, and after a while he speaks and acts like a very crazy man. He is in a kind of dream; his imaginations are wild and disconnected, his language is incoherent.
And the eyes of Valentine were as the eyes of a saint, but now he knew that behind them crouched a soul that was filled with evil. Slowly the air grew heavy. Slumber paced in the tiny room. The doctor struggled against it. But the colours of the brain-pictures faded.
The day was destined to hold for him still another unforgettable event in his life. Now that he was alone the memory of his master was not so vague as it had been yesterday, and the days before. Brain-pictures came back to him more vividly as the morning lengthened into afternoon, bridging slowly but surely the gulf that Neewa's comradeship had wrought.
If I listened to the explanation offered by my inner self, it was this: That Rafel Santoris and I had known each other for ages, longer than we were permitted to remember, that the brain-pictures, or rather soul-pictures, presented to me were only a few selected out of thousands which equally concerned us, and which were stored up among eternal records, and that these few were only recalled to remind me of circumstances which I might erroneously think were all entirely forgotten.
Vail found himself painting brain-pictures of the future of the telephone, and by the time that he was asked to become its General Manager, he had become so confident that, as he said afterwards, he "was willing to leave a Government job with a small salary for a telephone job with no salary."