Roya held up her right hand and raised and lowered those fingers again and again and gestured that hand toward the underground area. Then she gripped her right hand, representing Kosanna, around her left thumb, representing Toka. She made Toka struggle against Kosanna. The big slick-skin began rumbling deep in its great belly. Its bulging red eyes began burning with rising anger. Its tail and colossal body rippled as it poised to race to Toka's help. Roya shook her head emphatically. The big slick-skin rumbled questioningly. In the deepening twilight, Roya swiftly fingered a design in the smooth mud of the shore. The drawing crudely portrayed the big slick-skin and Roya and friends. It was also a map of the valley and the Big Brown on down to distant Sandcliff and the great dinosaur herd in that area. Roya pointed a finger to the character representing the big slick-skin, then pointed to the monster itself and raised her head and pretended to roar toward Sandcliff. She pointed to the herd around Sandcliff and wriggled her fingers to portray them running up valley to this spot. The Big Snake instantly whipped its head aloft and faced down valley. It yawned its cavernous mouth and blasted the darkening twilight with a roaring that slammed away and back and away again in echo. Quickly there was an answering roar from far down valley. The big slick-skin instantly blasted away another series of mighty roars. At once the Big Snake far down valley acknowledged and relayed the imperative message on. And even farther down valley a third Big Snake began blasting the purple night with that peculiar series of mighty roars. And the call to the Big Snakes was flashing down the valley and summoning the colossal monsters to the rescue! "Why not pile aboard old slicky here," Rok urged, "and start the fun now!" "Those flesh-eating fish in that river would cut him down in moments," Roya explained. "But the other Big Snakes can't get here till dawn!" Rok protested. "We'll camp on that butte." Roya gestured the big slick-skin to kneel. From atop that butte, the whole valley radiated away in starlit beauty. Sitting on the dewy grass, Roya ripped open a leaf-wrapped pack. The others joined in. The big slick-skin stood guard. * * * * * _In the black court, the twelve pairs of silvery eyes stared on into the coldly shining Sphere Of All Time...._