experts in the field before I undertook this job, Bud. I know more about hamadryads and demigods and winged horses than old man Bulfinch himself! Well—" He nodded significantly, and his voice lifted to the high-pitched tones of "Dr. Rockingham Roswell"—"here comes Lynn. Off we go!" Bud shot a swift, appraising glance at him. "Oh-ho! So it's 'Lynn', now, eh?" Fortunately, Rocky Russell did not have time to concoct an alibi for that slip of the tongue. Because the roller was drawing up beside them, Lynn was motioning them in. And in a few minutes they were on their way to New Boston. "You understand," said Factor Grossman, "I have never seen this creature myself, Dr. Roswell. I am merely repeating the description given me by some of my friends." Rocky nodded, busily jotting in his ubiquitous black notebook the facts just told him by the fat man. "A furry animal," he repeated, "with the netherparts of a horse and the torso of a human. Two curly black horns ... cloven hoofs ... is occasionally glimpsed in damp, woodland dells ... excellent!" He looked up, smiling. "Very interesting, sir. You have perhaps already noted the similarity between this ... er ... thing and the 'Centaur' of Greek mythology? Amazing, isn't it, that we should find the same ... er ... legendary monster on two worlds separated by so many millions of miles? Well, we must organize an expedition to search for this creature. Now, have you any other fables to add to my little collection?" He poised his pencil expectantly, his eyes vaguely eager and excited. "We-e-ell, let me see—" Grossman stroked a sleek, fleshy jaw—"I heard one the other day about—Yes? What is it, Grushl?" A Titanian had pressed open the door of the factor's private office. He glanced at the guests nervously. "If you please, sir—the Thing-that-Grows! It has broken its—" "That will do!" Grossman's voice crackled like the snap of a bulldozer's whip. He rose hastily, bowed apology to his visitors. "If you will excuse me a moment—" He strode to the door, propelled his underling out of sight and hearing. The three guests stared after him in astonishment. "Well!" exclaimed Lynn Graham. "Whatever came over him so quickly? Why, he turned positively pale!"