Warruk, the Jaguar, was no longer a cub. Four seasons of rain had come and gone since his advent into the world in the hollow cottonwood in the windfall. The erstwhile kitten, playing in the entrance to the cavity that had proved an irresistible attraction to Myla, the monkey, and to her sorrow, had grown into a creature of great size and powerful build, capable of more than holding his own with any other denizen of the jungle. Seen from a distance his coat was of a glossy, jet black color; but a close inspection would have revealed a regular pattern of rosettes similar to that marking the coats of his tawny brethren. The spots were very faint, however, like the watermarks on paper. In the forest he reigned supreme, fearing nothing but feared by all; the same was true in the pantenales. Where the interlocking branches of the trees formed a canopy that shut out the moonlight he moved like a specter in the blackness. In the open country his shadowy form was equally inconspicuous. Quick and terrible were his attacks. Like an avalanche he descended upon his victims, seemingly from nowhere, but with a violence and ferocity that bore down and crushed and rent all at the same time, and with a suddenness that prevented escape or resistance. So far Warruk had not ventured into the lower regions of the pantenal country--that vast world of marshlands, swampy forest islands and pampas bordering the great river compared to which the streams he had been accustomed to frequent in the upper reaches were but rippling brooks. Suma, his mother, had warned him against the region below her own well-defined hunting grounds. Once, exactly seven years before, while the world writhed and baked in the throes of the last great drought she had been compelled to venture into the unknown land. The streams and lagoons had dried; those of the animals that did not perish outright migrated, and Suma had followed the living stream as a matter of self-preservation for, without food and water, life could not be sustained. But the venture had proved painful in at least one respect for men dwelt along the border of the master river, and in the very first encounter with them Suma had suffered the loss of one ear--neatly shorn from her head by the broad, bamboo blade of a Cantana arrow. She was glad to escape even with such sacrifice; but she never forgot the injury. The haunts of the man-creatures were avoided thereafter, as well as their trails and everything else that savored of them. This dread she had tried to impart to her offspring. In the height of his powers, Warruk was ready to ignore the warning. Then, too, the sun now shone with an unusual brilliancy; fiery tongues from the sky seemed to lap up the water in the lakes and marshes, leaving nothing but vast areas of cracked and peeling mudflats sprinkled with brown, withered reeds that were a pitiful reminder of the waving expanses of green where the red-headed blackbirds had trilled their cheery song.