Case of the White Footprints
The Apparition of Burling Court
Introduction
MEET DR. THORNDYKE
My subject is Dr. John Thorndyke, the hero or central character of most of my detective stories. So I'll give you a short account of his real origin; of the way in which he did in fact come into existence.
To discover the origin of John Thorndyke I have to reach back into the past for at least fifty years, to the time when I was a medical student preparing for my final examination. For reasons which I need not go into I gave rather special attention to the legal aspects of medicine and the medical aspects of law. And as I read my text-books, and especially the illustrative cases, I was profoundly impressed by their dramatic quality. Medical jurisprudence deals with the human body in its relation to all kinds of legal problems. Thus its subject matter includes all sorts of crime against the person and all sorts of violent death and bodily injury: hanging, drowning, poisons and their effects, problems of suicide and homicide, of personal identity and survivorship, and a host of other problems of the highest dramatic possibilities, though not always quite presentable for the purposes of fiction. And the reported cases which were given in illustration were often crime stories of the most thrilling interest. Cases of disputed identity such as the Tichbourne Case, famous poisoning cases such as the Rugeley Case and that of Madeline Smith, cases of mysterious disappearance or the detection of long-forgotten crimes such as that of Eugene Aram; all these, described and analysed with strict scientific accuracy, formed the matter of Medical Jurisprudence which thrilled me as I read and made an indelible impression.
But it produced no immediate results. I had to pass my examinations and get my diploma, and then look out for the means of earning my living. So all this curious lore was put away for the time being in the pigeon-holes of my mind—which Dr. Freud would call the Unconscious—not forgotten, but ready to come to the surface when the need for it should arise. And there it reposed for some twenty years, until failing health compelled me to abandon medical practice and take to literature as a profession.
It was then that my old studies recurred to my mind. A fellow doctor, Conan Doyle, had made a brilliant and well-deserved success by the creation of the immortal Sherlock Holmes. Considering that achievement, I asked myself whether it might not be possible to devise a detective story of a slightly different kind; one based on the science of Medical Jurisprudence, in which, by the sacrifice of a certain amount of dramatic effect, one could keep entirely within the facts of real life, with nothing fictitious excepting the persons and the events. I came to the conclusion that it was, and began to turn the idea over in my mind.
But I think that the influence which finally determined the character of my detective stories, and incidentally the character of John Thorndyke, operated when I was working at the Westminster Ophthalmic Hospital. There I used to take the patients into the dark room, examine their eyes with the ophthalmoscope, estimate the errors of refraction, and construct an experimental pair of spectacles to correct those errors. When a perfect correction had been arrived at, the formula for it was embodied in a prescription which was sent to the optician who made the permanent spectacles.
Now when I was writing those prescriptions it was borne in on me that in many cases, especially the more complex, the formula for the spectacles, and consequently the spectacles themselves, furnished an infallible record of personal identity. If, for instance, such a pair of spectacles should have been found in a railway carriage, and the maker of those spectacles could be found, there would be practically conclusive evidence that a particular person had travelled by that train. About that time I drafted out a story based on a pair of spectacles,
