A mad scheme flashed briefly through his mind. Get the ingot, crate it up, fly it to Mexico, out of the country. Eric Barnes owned a Piper Cub. He could easily get it into Mexico. Sell it. Retire. Live in comfort the rest of his life.

Professor Douglas snorted angrily. It was his duty to return it. Call the Denver Mint, tell them about it. Or the police department. He reversed his car and backed up until he was even with the metal bar. He turned off the motor and slid out onto the dark highway. He had a job to do. As a loyal citizen -- and, God knew, fifty tests had shown he was loyal -- there was a job for him here. He leaned into the car and fumbled in the dashboard for the flashlight. If somebody had lost a bar of gold, it was up to him...

A bar of gold. Impossible. A slow, cold chill settled over him, numbing his heart. A tiny voice in the back of his mind spoke clearly and rationally to him: Who would walk off and leave an ingot of gold?

Something was going on.

Fear gripped him. He stood frozen, trembling with terror. The dark, deserted highway. The silent mountains. He was alone. A perfect spot. If they wanted to get him --

They?

Who?

He looked quickly around. Hiding in the trees, most likely. Waiting for him. Waiting for him to cross the highway, leave the road and enter the woods. Bend down and try to pick up the ingot. One quick blow as he bent over; that would be it.

Douglas scrambled back into his car and snapped on the motor. He raced the motor and released the brake. The car jerked forward and gained speed. His hands shaking, Douglas bore down desperately on the wheel. He had to get out. Get away before -- whoever they were got him.

As he shifted into high he took one last look back, peering around through the open window. The ingot was still there, still glowing among the dark weeds at the edge of the highway. But there was a strange vagueness about it, an uncertain waver in the nearby atmosphere.