If there _had_ been secrets, though, the system was a good one. By using the combination of a balloon and a rocket, Lefty got his equipment high enough to intercept Wallops Island telemetry, and he did it without anyone suspecting he was launching rockets. The rockets and balloons dropped into the ocean, unseen--or, if seen, the first thought would be that they had come from Wallops. The shape of the balloons also kept anyone from suspecting that the theft of data was the real purpose. It was a fine scheme, even though it had all been unnecessary. The girls let out a yell that startled Rick from his reverie. Scotty immediately throttled back, and the boat's momentum carried it forward. Rick watched the water, and finally saw a dark blur on the sandy bottom ahead and to the left. He drew, then waited until he saw the dark patch move. This time he allowed for the water's refraction. He loosed the arrow. The stingaree felt the impact and reacted violently. Its tail lashed up to strike with sharp barbs at the intruder. The tail lashed the arrow shaft without effect. The ray's wings moved in a rippling motion like that of some weird flying carpet. It flashed upward, and into the air, then crashed back on the surface of the water again. It dived, heading for the bottom. Rick kept the drag on his reel, letting the ray fight against the braking action. The fish didn't give up easily. It had the primitive nervous system and great vitality of its relatives, the sharks, and it fought long after an edible fish, like a rockfish, would have given up. When the ray moved toward the now stationary boat, Rick reeled in line. When the ray showed a new burst of energy and started away, Rick let it fight against the drag, pulling out line. The girls were down on the foredeck with him now, and Scotty had joined the Brants on the upper deck in order to get a better view of the fight. Finally, the ray tired. Rick drew it in close to the hull and waited while the vicious tail lashed futilely. Jan took the gaff that Scotty handed down to her and gave it to Rick. He hooked the sea beast and lifted it from the water. "Stand clear!" he warned. "I don't want either of you getting hit with that tail!" The girls hurried up the ladder to safety, and Rick lifted the stingaree to the deck. It was a small one, weighing about fifteen pounds. The wet, leathery body glistened, and the kite-shaped wings flapped like those of some fantastic bird. Scotty looked down at the ray. "You caught a cripple," he said. "There's something wrong with it." Rick looked up. He knew the answer, but he asked the question anyway, grinning. "Yes? What's wrong with it?" "It can't fly," Scotty said. * * * * * RICK BRANT SCIENCE STORIES [Illustration: RICK BRANT]