“But Parkes’s case was quite different. I certainly believe he had a cancerous growth, and thought that an operation was inevitable if his life was to be saved. Even then, the most I hoped for was an alleviation of pain, as the disease progressed, and a year or two more, at the most, of life. Instead, I apply another remedy, at your suggestion, and if he goes on as he has been doing, the growth will be a nodule in another week or two, and I should expect it to disappear altogether. Taking everything into consideration, if you asked me the question whether this X-ray treatment was the cause of the cure, I should be obliged to say ‘Yes.’ I don’t believe in such a treatment, but I believe it is curing him. I suppose that it was suggested to you by a fraudulent, spiritualistic medium in a feigned trance, who was inspired by Aesculapius or some exploded heathen deity, for I remember you said you were going down into the country for some spiritual business.... “Well, Parkes is getting better, and I am so old-fashioned a fellow that I would sooner a patient of mine got better by incredible methods, than died under my skilful knife.... Of course, we trained people know nothing, but we have to act according to the best chances of our ignorance. I entirely believed that the knife was the only means of saving the man, and now, when I stand confuted, the only thing that I can save is my honesty, which I hereby have done. Let me know, at your leisure, whether you just thought you would, on your own idea, like me to try X-rays, or whether some faked voice from the grave suggested it. “Ever yours, “Godfrey Symes. “P.S.--If it was some beastly voice from the grave, you might tell me in confidence who the medium was. I want to be fair....” That is the story; the reader will explain it according to his temperament. And as I have told Parkes, who is now back with me again, to look into the garden-room before post-time and take a registered packet to the office, it is time that I got it ready for him. So here is the completed packet in manuscript, to be sent to the printer’s. From my window I shall see him go briskly along the street down which Machaon walked on a snowy morning. Negotium Perambulans.... Negotium Perambulans....