One afternoon they made a discovery of more than ordinary moment. Flocks of rheas--ostrichlike birds--were common in the open country. They were so wary that the two had only infrequent glimpses of the long-legged, long-necked birds as they dashed away and faded into the horizon. To pursue them was out of the question and Suma knew it for they ran with the speed of the wind. But this afternoon they came upon one of the great creatures squatting on the ground, head and neck straight down, outstretched in a serpentine attitude; nor did it attempt to move until the hunters had approached to within a few yards. Then it ruffled up its feathers, raised its head and hissed and bellowed in a threatening manner; but Suma was not dismayed. She crouched, gave vent to one hoarse roar and then began to advance. The bird held her ground until the Jaguar was less than six feet away, then rose suddenly and charged. Suma well knew what to expect, nimbly stepped aside to avoid the kick that was aimed at her and struck a swift blow in return that sent a fluff of feathers into the air. That was enough for the bird; she kept on going without even turning to see if the big cat was in pursuit and soon disappeared in the tall grass. Before them lay a heap of smooth, white objects, larger than Warruk's head and as he looked on enquiringly his mother planted one massive paw directly in the midst of the pile with a crash that sent up a shower of white and yellow spray. The cub eagerly lapped up the contents of the broken eggs each of which held in volume as much as a dozen of the hen. As the weeks rolled on Warruk grew rapidly in size and strength and the restless disposition that went with his black color began to make itself felt. He became impatient of his mother's caution and strategy. Something within him urged him even at his tender age to assert himself, to proclaim his superiority and to strike out alone. At first he was content merely to stray from Suma's side only to return at her summons or when the odds were against him. Self-reliance came to him bit by bit. He learned that mastery in the wilderness depended largely upon a game of bluff--especially when cornered, and on one occasion when a fox, far larger than he, advanced menacingly he charged straight at it with a deep snarl; the fox turned and ran away. So, emboldened by this encounter Warruk was not slow to make use of the new knowledge gained from experience and encouraged by instinct. He strayed further and further from Suma's protection and at last came the day when the two drifted so far apart that the beginning of a permanent separation had most assuredly arrived. The cub was startled, at first, when his mother failed to respond promptly to his call. He realized all of a sudden that he was alone.