"I ordered the Belgium factory to rush work on the ship," said Greg. "But it will be a couple of weeks yet. We just have to sit tight and wait. As soon as we have the ship we'll start in on Chambers; but until we get the ship, we just have to dig in and stay on the defensive."
He studied the scene in the screen. The ship had leveled off, was banking in to the port. His eyes turned away, took in the laboratory with its crowding mass of machinery.
"We don't want to fool ourselves about Chambers," he said. "He may not have the power here on Earth that he does on the other planets, but he's got plenty. Feeling the way he does, he'll try to finish us off in a hurry now."
Russ reached out to the table that stood beside the bank of controls and picked up a small, complicated mechanism. Its face bore nine dials, with the needles on three of them apparently registering, the other six motionless.
"What is that?" asked Greg.
"A mechanical detective," said Russ. "A sort of mechanical shadow. While you were busy with the stock market stunt, I made several of them. One for Wilson and another for Chambers and still another for Craven." He hoisted and lowered the one in his hand. "This one is for Stutsman."
"A shadow?" asked Greg. "Do you mean that thing will trail Stutsman?"
"Not only trail him," said Russ. "It will find him, wherever he may be. Some object every person wears or carries is made of iron or some other magnetic metal. This 'shadow' contains a tiny bit of that ridiculous military decoration that Stutsman never allows far away from him. Find that decoration and you find Stutsman. In another one I have a chunk of Wilson's belt buckle, that college buckle, you know, that he's so proud of. Chambers has a ring made of a piece of meteoric iron and that's the bait for another machine. Have a tiny piece off Craven's spectacles in his machine. It was easy to get the stuff. The force field enables a man to reach out and take anything he wants to, from a massive machine to a microscopic bit of matter. It was a cinch to get the stuff I needed."
Russ chuckled and put the machine back on the table. He gestured toward it.
"It maintains a tiny field similar to our television field," he explained. "But it's modified along a special derivation with a magnetic result. It can follow and find the original mass of any metallic substance it may contain."