THE FLY Arthur Forges Man is probably not (says science fiction) the only sizable pebble on the macrocosmic beach: other "intelligent" entities may well be pursuing their purposes regardless of us, and indeed indifferent to us. A physically small manifestation of this hypothesis is brilliantly postulated here. Do such things exist? Can they exist? One thing is certain: they ought to exist. We belong to a species much too ready to regard itself as the highest, finest flower of Creation. To throw a little cold water on that conceit, as for example by describing what "he" saw (and what happened to him when he tried to interfere), is to help make us just that fraction less complacent, that fraction more sensible. Shortly after noon the man unslung his Geiger counter and placed it carefully upon a flat rock by a thick, inviting patch of grass. He listened to the faint, erratic background ticking for a moment, then snapped off the current. No point in running the battery down just to hear stray cosmic rays and residual radio-activity. So far he'd found nothing potent, not a single trace of workable ore. Squatting, he unpacked an ample lunch of hard-boiled eggs, bread, fruit, and a Thermos of black coffee. He ate hungrily, but with the neat, crumbless manners of an outdoorsman; and when the last bite was gone, stretched out, braced on his elbows, to sip the remaining drops of coffee. It felt mighty good, he thought, to get off your feet after a six-hour hike through rough country. As he lay there, savouring the strong brew, his gaze suddenly narrowed and became fixed. Right before his eyes, artfully spun between two twigs and a small, mossy boulder, a cunning snare for the unwary spread its threads of wet silver in a network of death. It was the instinctive creation of a master engineer, a nearly-perfect logarithmic spiral, stirring gently in a slight up-draught. He studied it curiously, tracing with growing interest the special cable, attached only at the ends, that led from a silk cushion at the web's centre up to a crevice in the boulder. He knew that the mistress of this snare must be hidden there, crouching with one hind foot on her primitive telegraph wire and awaiting those welcome vibrations which meant a victim thrashing hopelessly among the sticky threads. He turned his head, desiring a proper angle, and soon found it. Deep in the dark crevice, the spider's eyes formed a sinister, jewelled pattern. Yes, she was at home, patiently watchful. It was all very efficient, and in a reflective mood, drowsy from his exertions and a full stomach, he pondered the small miracle before him: how a speck of protoplasm, a mere dot of white nerve-tissue which was a spider's brain, had antedated the mind of Euclid by countless centuries. Spiders are an ancient race; ages before man wrought wonders through his subtle abstractions of points and lines, a spiral not to be distinguished from this one winnowed the breezes of some prehistoric summer. Then he blinked, his attention once more sharpened. A glowing gem, glistening metallic blue, had planted itself squarely upon the web. As if manipulated by a conjurer, the bluebottle fly had appeared from nowhere. It was an exceptionally fine specimen, he decided; large, perfectly formed, and brilliantly rich in hue. He eyed the insect wonderingly. Where was the usual panic, the frantic struggling, the shrill, terrified buzzing? It rested there with an odd indifference to restraint that puzzled him. There was at least one reasonable explanation. The fly might be sick or dying, the prey of parasites. Fungi and the ubiquitous roundworms shattered the ranks of even the most fertile. So unnaturally still was this fly that the spider, wholly unaware of its feathery landing, dreamed on in her shaded lair. Then, as he watched, the bluebottle, stupidly perverse, gave a single sharp tug; its powerful wings blurred momentarily, and a high-pitched buzz sounded. The man sighed, almost tempted to interfere. Not that it mattered how soon the fly betrayed itself. Eventually the spider would have made a routine inspection; and unlike most people, he knew her for a staunch friend of man, a tireless killer of insect pests. It was not for him to steal her dinner and tear her web. But now, silent and swift, a pea on eight hairy, agile legs, she glided over her swaying net. An age-old tragedy was about to be enacted, and the man waited with pitying interest for the inevitable denouement. About an inch from her prey, the spider paused briefly, estimating the situation with diamond-bright, soul-less eyes. The man knew what would follow. Utterly contemptuous of a mere fly, however large, lacking either sting or fangs, the spider would unhesitatingly close in, swathe the insect with silk, and drag it to her nest in the rock, there to be drained at leisure. But instead of a fearless attack, the spider edged cautiously nearer. She seemed doubtful, even uneasy. The fly's strange passivity apparently worried her. He saw the needle-pointed mandibles working, ludicrously suggestive of a woman wringing her hands in agonized indecision. Reluctantly she crept forward. In a moment she would turn about, squirt a preliminary jet of silk over the bluebottle, and by dexterously rotating the fly with her hind legs, wrap it in a gleaming shroud. And so it appeared, for satisfied with a closer inspection, she forgot her fears and whirled, thrusting her spinnerets towards the motionless insect. Then the man saw a startling, an incredible thing. There was a metallic flash as a jointed, shining rod stabbed from the fly's head like some fantastic rapier. It licked out with lightning precision, pierced the spider's plump abdomen, and remained extended, forming a terrible link between them. He gulped, tense with disbelief. A bluebottle fly, a mere lapper of carrion, with an extensible, sucking proboscis! It was impossible. Its tongue is only an absorbing cushion, designed for sponging up liquids. But then was this really a fly after all? Insects often mimic each other, and he was no longer familiar with such points. No, a bluebottle is unmistakable; besides, this was a true fly: two wings and everything. Rusty or not, he knew that much. The spider had stiffened as the queer lance struck home; now she was rigid, obviously paralysed. And her swollen abdomen was contracting like a tiny fist as the fly sucked its juices through that slender, pulsating tube. He peered more closely, raising himself to his knees and longing for a lens. It seemed to his straining gaze as if that gruesome beak came not from the mouth region at all, but through a minute, hatchlike opening between the faceted eyes, with a nearly invisible square door ajar. But that was absurd; It must be the glare, and-ah! Flickering, the rod retracted; there was definitely no such opening now. Apparently, the bright sun was playing tricks. The spider stood shrivelled, a pitiful husk, still upright on her thin legs. One thing was certain: he must have this remarkable fly. If not a new species, it was surely very rare. Fortunately it was stuck fast in the web. Killing the spider could not help it. He knew the steely toughness of those elastic strands, each a tight helix filled with superbly tenacious gum. Very few insects, and those only among the strongest, ever tear free. He gingerly extended his thumb and forefinger. Easy now; he had to pull the fly loose without crushing it. Then he stopped, almost touching the insect, and staring hard. He was uneasy, a little frightened. A brightly glowing spot, brilliant even in the glaring sunlight, was throbbing on the very tip of the blue abdomen. A reedy, barely audible whine was coming from the trapped insect. He thought momentarily of fireflies, only to dismiss the notion with scorn for his own stupidity. Of course, a firefly is actually a beetle, and this thing was - not that, anyway. Excited, he reached forward again, but as his plucking fingers approached, the fly rose smoothly in a vertical ascent, lifting a pyramid of taut strands and tearing a gap in the web as easily as a flipped stone. The man was alert, however. His cupped hand, nervously swift, snapped over the insect, and he gave a satisfied grunt. But the captive buzzed in his grasp with a furious vitality that appalled him, and he yelped as a searing, slashing pain scalded the sensitive palm. Involuntarily he relaxed his grip. There was a streak of electric blue as his prize soared, glinting in the sun. For an instant he saw that odd glow-worm tail light, a dazzling spark against the darker sky, then nothing. He examined the wound, swearing bitterly. It was purple, and already little blisters were forming. There was no sign of a puncture. Evidently the creature had not used its lancet, but merely spurted venom-acid perhaps-on the skin. Certainly the injury felt very much like a bad burn. Damn and blast! He'd kicked away a real find, an insect probably new to science. And with a little more care, he might have caught it. Stiff and vexed, he got sullenly to his feet and repacked the lunch kit. He reached for the Geiger counter, snapped on the current, took one step towards a distant rocky outcrop-and froze. The slight background noise had given way to a veritable roar, an electronic avalanche that could mean only one thing. He stood there, scrutinizing the grassy knoll and shaking his head in profound mystification. Frowning, he put down the counter. As he withdrew his hand, the frantic chatter quickly faded out. He waited, half-stooped, a blank look in his eyes. Suddenly they lit with doubting, half-fearful comprehension. Catlike, he stalked the clicking instrument, holding one arm outstretched, gradually advancing the blistered palm. And the Geiger counter raved anew.