Then suddenly the possible significance of [Greek: phengos x] flashed on me, and I marvelled at my slowness. [Greek: phengos], a beam of light, a ray, and the letter [Greek: x], the equivalent of the English _x_. That had come in direct answer to my question as to what would cure Parkes, and it was without hesitation or delay that I wrote to Symes. I reminded him that he had said that he had no objection to any possible remedy, provided it was not harmful, being tried on his patient, and I asked him to treat him with X-rays. The whole sequence of events had been so frankly amazing, that I believe the veriest sceptic would not have done otherwise than I did. Our sittings continued, but after this day we had no further evidence of this second control. It looked as if the intelligence (even the most incredulous will allow me, for the sake of convenience, to call that intelligence Machaon) that had described this room, and told Mrs. Forrest that he had work to do here, had finished his task. Machaon had said, or so my interpretation was, that X-rays would cure Parkes. In justification of this view it is proper to quote from a letter which I got from Symes a week later. “There is no need for you to come up to break to Parkes that an operation lies in front of him. In answer to your request, and without a grain of faith in its success, I treated him with X-rays, which I assured you were useless. To-day, to speak quite frankly, I don’t know what to think, for the growth has been steadily diminishing in size and hardness, and it is perfectly evident that it is being absorbed and is disappearing. “The treatment through which I put Parkes is that of ----. Here in this hospital we have had patients to whom it brought no shadow of benefit. Often it had been continued on these deluded wretches till any operation which might possibly have been successful was out of the question owing to the encroachment of the growth. But from the first dose of the X-rays, Parkes began to get better, the growth was first arrested, and then diminished. “I am trying to put the whole thing before you with as much impartiality as I can command. So, on the other side, you must remember that Parkes’s was never a proved case of cancer. I told you that it could not be proved till the exploratory operation took place. All the symptoms pointed to cancer--you see, I am trying to save my own face--but my diagnosis, though confirmed by ----, may have been wrong. If he only had what we call a benign tumour, the case is not so extraordinary; there have been plenty of cases when a benign tumour has disappeared by absorption or what not. It is unusual, but by no means unknown. For instance....