Her hands shook when she tried to adjust the focusing. Using low power she examined the specimen, squinting through the angled tube. Once she turned the substage mirror a bit to catch direct the light streaming in the window. Brion stood behind her, fists clenched, forcefully controlling his anxiety. "What do you see?" he finally blurted out.
"Phagocytes, platelets ... leucocytes ... everything seems normal." Her voice was dull, exhausted, her eyes blinking with fatigue as she stared into the tube.
Anger at defeat burned through Brion. Even faced with failure he refused to accept it. He reached over her shoulder and savagely twisted the turret of microscope until the longest lens was in position. "If you can't see anything—try the high power! It's there—I know it's there! I'll get you a tissue specimen." He turned back to the disemboweled cadaver.
His back was turned and he did not see the sudden stiffening of her shoulders, or the sudden eagerness that seized her fingers as they adjusted the focus. But he did feel the wave of emotion that welled from her, impinging directly on his empathic sense. "What is it?" he called to her, as if she had spoken aloud.
"Something ... something here," she said, "in this leucocyte. It's not a normal structure, but it's familiar. I've seen something like it before, but I just can't remember." She turned away from the scope and unthinkingly pressed her gory knuckles to her forehead. "I know I've seen it before."
Brion squinted into the deserted microscope and made out a dim shape in the center of the field. It stood out sharply when he focused—the white, jellyfish shape of a single-celled leucocyte. To his untrained eye there was nothing unusual about it. He couldn't know what was strange—when he had no idea of what was normal.
"Do you see those spherical green shapes grouped together?" Lea asked. Before Brion could answer she gasped "I remember now!" Her fatigue was forgotten in her excitement. "Icerya purchasi that was the name, something like that. It's a coccid, a little scale insect. It had those same shapes collected together within its individual cells."
"What do they mean? What is the connection with Dis?"
"I don't know," she said, "it's just that they look so similar. And I never saw anything like this in a human cell before. In the coccids, the green particles grow into a kind of yeast that lives within the insect. Not a parasite, but a real symbiote—"