It was about this time that Henley-Davenport was making his earlier discoveries in the field of induced radioactivity. The results were too technical for the unscientific man to appreciate; but I had become interested, not so much in details as in possibilities; and I determined to go across the Park and pay a visit to Wotherspoon one evening. I knew that, as far as published information went, he would be in possession of the latest news; and it was easier to get it from him than to read it myself.
It was warm weather then. I decided to use my car instead of walking through the Park. I had a slight headache, and I thought that possibly a short spin later, in the cool of the evening, might take it away. As I drove, I noticed how thunder-clouds were banking up on the horizon, and I congratulated myself that even if they broke I should have the shelter of the car and be saved a walk home through the rain.
When I reached Cumberland Terrace, I was, as I expected, shown up into Wotherspoon’s sanctum. I found him, as usual, deeply engrossed in work: he had his eye to the tube of a large microscope, down which he was staring intently. I noticed a slight change in the equipment of the room. There seemed to be fewer retorts, flasks and test-tube racks than there usually were; and two large tables at the windows were littered with flat glass dishes containing thin slabs of pinkish material which seemed to be gelatine. Things like incubators took up a good deal of the remaining space. But I doubt if it is worth while describing what I saw: I know very little of such things; and I question whether his apparatus would have passed muster with an expert in any case.
After a certain amount of fumbling with the microscope, which seemed largely a formal matter leading to nothing, he rose from his seat and greeted me with his customary pre-occupied air. For a time we smoked and talked of Henley-Davenport’s work; but after he had answered my questions it became evident that he had no further interest in the subject; and I was not surprised when, after a pause, he broke entirely new ground in his next remark.
“Do you know, Flint,” he said, “I am losing interest in all these investigations of the atomic structure. It seems to me that while unimaginative people like Henley-Davenport are groping into the depths of the material Universe, the real thing is passing them by. After all, what is mere matter in comparison with the problems of life? I have given up atoms and I am going to begin work upon living organisms.”
That was so characteristic of Wotherspoon. He was always “losing interest in” something and “going to begin work” upon something else. I nodded without saying anything. After all, it seemed of very little importance what he “worked” at.
“I wonder if you ever reflect, Flint,” he continued, “if you ever ponder over our position in this Universe? Here we stand, like Dante, ‘midway in this our mortal life’; at the half-way house between the cradle and the grave in time. And in space, too, we represent the middle term between the endless stretches of the Macrocosm and the bottomless deeps of the Microcosm. Look up at the night-sky and your eyes will tingle with the rays from long-dead stars, suns that were blotted out ages ago though the light they sent out before they died still thrills across the ether on its journey to our Earth. Take your microscope, and you find a new world before you; increase the magnification and another, tinier cosmos sweeps into your ken. And so, with ever-growing lens-power, we can peer either upward into stellar space or downward into the regions of the infinitesimal, while between these deeps we ourselves stand for a time on our precarious bridge of Earth.”
I began to suspect that he was trying over some phrases for a coming lecture; but it was early yet and I could not decently make an excuse for leaving him. I took a fresh cigar and let him go on without interruption.
“It always seems strange to me how little the man in the street knows of the things around him. The microscopic world has no existence as far as his mind is concerned. A grain of dust is too small for him to notice; it must blow into his eye before he appreciates that it has perceptible size at all. And yet, all about him and within him there lives this wonderful race of beings, passing to and fro in his veins as we do in the streets and avenues of a great city; coming to birth, going about their concerns, falling ill and dying, just as men do in London at this hour. Think of the battles, the victories, and the defeats which take place minute by minute in the tiniest drop of our blood; and the issue of the war may be the life or death of one of us. They talk of the struggle for existence; but the real struggle for existence is going on within us and not in the outer world. Phagocyte against bacterium—that is where the fitness of an organism comes to its ultimate test. A slight hitch in the reinforcements, a minute’s delay in bringing numbers to bear, and the keystone is out of the edifice; nothing is left but a ruin.
“It always reminds me of those frontier skirmishes—a mere handful of troops engaged on either side—upon the issue of which the fate of an empire may depend. Get a new set of enemies, some novel type of bacteria with fresh tactics which the phagocytes cannot cope with—and down comes a human being. It strikes wonder into me, that, you know. A human body is so colossal in comparison with these bacteria that they can have no idea even of our existence; and yet they can destroy the whole machinery upon which our life depends. It’s almost as if a few shots fired in Africa could crumble the whole Earth into an impalpable dust.