Fred Trent's eyebrows raised in surprise.

"That so? Something wrong with him?"

"No. He's just having a physical checkup. Seems to be worried about his heart. Dr. Fenwick didn't need me since it's a routine job, so I took Brutus for a walk."

Trent nodded. "That's a bit of luck. I think I'll stick around and give Gaddon a lift out to the Proving Grounds. I wanted to talk to him anyway."

"In that case," the girl replied, "you can give me a hand putting Brutus back in his kennel. Once he gets out he's something of a problem."

Fred nodded, taking the leash from her hands and feeling the big dog tug against him.

"Never could figure out why Fenwick wanted a big hound like this. Seems to me a terrier would be more practical."

"That's a matter of taste," Joan answered. "Dr. Fenwick is very fond of Brutus—and so am I for that matter. But tell me something about this experiment you're covering."

They had turned in at a large Spanish type house that Trent knew served as a combination living quarters and office for the famous gland specialist. He shrugged.

"Don't know much about it myself. They're shooting off this new type rocket, a really big affair, loaded with all sorts of instruments. Some sort of experiment with cosmic rays. The rocket will go up to the outer layers of the Earth's atmosphere, where a clocked mechanism will release a parachute-attached section containing the instruments. This will float back to the surface of the Earth.