THE PARASITE A Story BY A. CONAN DOYLE AUTHOR OF "THE REFUGEES" "MICAH CLARKE" ETC. 1894 THE PARASITE I March 24. The spring is fairly with us now. Outside my laboratory window the great chestnut-tree is all covered with the big, glutinous, gummy buds, some of which have already begun to break into little green shuttlecocks. As you walk down the lanes you are conscious of the rich, silent forces of nature working all around you. The wet earth smells fruitful and luscious. Green shoots are peeping out everywhere. The twigs are stiff with their sap; and the moist, heavy English air is laden with a faintly resinous perfume. Buds in the hedges, lambs beneath them--everywhere the work of reproduction going forward! I can see it without, and I can feel it within. We also have our spring when the little arterioles dilate, the lymph flows in a brisker stream, the glands work harder, winnowing and straining. Every year nature readjusts the whole machine. I can feel the ferment in my blood at this very moment, and as the cool sunshine pours through my window I could dance about in it like a gnat. So I should, only that Charles Sadler would rush upstairs to know what was the matter. Besides, I must remember that I am Professor Gilroy. An old professor may afford to be natural, but when fortune has given one of the first chairs in the university to a man of four-and-thirty he must try and act the part consistently. What a fellow Wilson is! If I could only throw the same enthusiasm into physiology that he does into psychology, I should become a Claude Bernard at the least. His whole life and soul and energy work to one end. He drops to sleep collating his results of the past day, and he wakes to plan his researches for the coming one. And yet, outside the narrow circle who follow his proceedings, he gets so little credit for it. Physiology is a recognized science. If I add even a brick to the edifice, every one sees and applauds it. But Wilson is trying to dig the foundations for a science of the future. His work is underground and does not show. Yet he goes on uncomplainingly, corresponding with a hundred semi-maniacs in the hope of finding one reliable witness, sifting a hundred lies on the chance of gaining one little speck of truth, collating old books, devouring new ones, experimenting, lecturing, trying to light up in others the fiery interest which is consuming him. I am filled with wonder and admiration when I think of him, and yet, when he asks me to associate myself with his researches, I am compelled to tell him that, in their present state, they offer little attraction to a man who is devoted to exact science. If he could show me something positive and objective, I might then be tempted to approach the question from its physiological side. So long as half his subjects are tainted with charlatanerie and the other half with hysteria we physiologists must content ourselves with the body and