“There may be design in this,” he said, still speaking excellent English. “It may be decreed that I should leave some account behind as a warning to all rash mortals who would set their wits up against workings of Nature. I leave it with you. Make such use as you will of it. I speak to you now with my feet upon the threshold of the other world. “I am, as you surmised, an Egyptian--not one of the down-trodden race of slaves who now inhabit the Delta of the Nile, but a survivor of that fiercer and harder people who tamed the Hebrew, drove the Ethiopian back into the southern deserts, and built those mighty works which have been the envy and the wonder of all after generations. It was in the reign of Tuthmosis, sixteen hundred years before the birth of Christ, that I first saw the light. You shrink away from me. Wait, and you will see that I am more to be pitied than to be feared. “My name was Sosra. My father had been the chief priest of Osiris in the great temple of Abaris, which stood in those days upon the Bubastic branch of the Nile. I was brought up in the temple and was trained in all those mystic arts which are spoken of in your own Bible. I was an apt pupil. Before I was sixteen I had learned all which the wisest priest could teach me. From that time on I studied Nature’s secrets for myself, and shared my knowledge with no man. “Of all the questions which attracted me there were none over which I laboured so long as over those which concern themselves with the nature of life. I probed deeply into the vital principle. The aim of medicine had been to drive away disease when it appeared. It seemed to me that a method might be devised which should so fortify the body as to prevent weakness or death from ever taking hold of it. It is useless that I should recount my researches. You would scarce comprehend them if I did. They were carried out partly upon animals, partly upon slaves, and partly on myself. Suffice it that their result was to furnish me with a substance which, when injected into the blood, would endow the body with strength to resist the effects of time, of violence, or of disease. It would not indeed confer immortality, but its potency would endure for many thousands of years. I used it upon a cat, and afterwards drugged the creature with the most deadly poisons. That cat is alive in Lower Egypt at the present moment. There was nothing of mystery or magic in the matter. It was simply a chemical discovery, which may well be made again.