their linear classification and storage. Another method of classification, however, presents far more interesting possibilities. I have, from time to time, sifted my cases into their degree of stimulation. Some were barely stimulating, others moderately so, and some were highly stimulating. But, a few were supremely—exquisitely—stimulating. One recalls these cases in much the same way as one recalls the three or four bottles of vintage Bordeaux that go beyond all other vintages and produce a sublime taste memory that endures forever.
At the summit of stimulation is the case Watson called The Hound of the Baskervilles. Next is The Speckled Band. Third is The Musgrave Ritual . Fourth is The Devil’s Foot. And fifth is The Dancing Men . Of course, Watson had his own preferences; these, however, are mine and, in the end, it is my mind that is stimulated or not. These five cases were more than just interesting puzzles and each offered differing degrees of the narcotics Danger and Death.
Many of my cases were concerned with deduction alone; some inferential and some mathematical. Often they simply involved the finding of a notable gemstone, or a government document, or an indiscreet photograph. Deduction, to be maximally stimulating to me, is best associated with Danger and Death. The three elements become symbiotic; each sets each of the other in motion; the three in motion together cause my brain exquisite pleasure. And that pleasure is the only exquisite pleasure I allow into my sphere of experience. In the opposite dark side of the mirror, it is the same pleasure that the murderer feels at the moment life leaves his victim. Triumph. Supremacy. Power over life. Blood lust. The ultimate consuming stimulation.
The essential act, however, is to keep the mirror intact. Should the mirror ever be allowed to crack, the opposites will be forced together and—in suspension like oil and water—will fight for dominance. To be a genius in one’s chosen world, one can never allow control to shatter or an internal fight for dominance to begin. The moment one allows the mirror to crack, genius departs and brutishness ascends. That is what happened that morning on the precipice of Reichenbach Falls. So much depends upon the strength of the glass.
12
I have reflected on the potential for the perfect crime of murder during my long career. Only one case involved a perfect murder by trickery, but Culverton Smith may have come as close as anyone in my experience to creating the perfect death by the use of poison. Of all the poisons available to the murderer, bacteria are a particularly virulent and ambiguous form of poison. If the delivery of deadly bacteria to the victim’s bloodstream is sufficiently ambiguous, proof of intent to murder is exceptionally difficult. As with Smith’s attempt on my life, it was not even necessary for him to be present.
Potentially lethal bacteria can be had for the taking quite easily. Septic dressings and the suppurations of necrosis can be had from any hospital bin. The infection of a needle, or a thorn or a splinter of glass is straightforward and, generally, not particularly unusual. Similarly, the use of bacteria from animal husbandry, resulting in unusual but not suspicious death, such as anthrax, does not immediately suggest murder; rather, it suggests only that the victim contracted a deadly disease from an animal or a farm. If the murderer is only reasonably intelligent and minimally clever, premeditated, bacteria-induced murder can be easily mimicked. With an acute mind behind the crime, perhaps only one out of twenty investigators will consider even the slight possibility of murder.
Other lethal toxins lend themselves superbly to the perfect murder, provided they have a direct and immediate route to the blood or the nervous system of the victim. Curare paralyses the nerves of respiration, causing almost immediate suffocation; the fumes of radix pedis diaboli produce near-instant insanity
Hilaire Belloc
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Sierra Avalon
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A. B. Yehoshua
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P. L. Nunn