His solicitude amazed me, because if what he'd just said was true—and I had no reason to doubt it—he should have been more shaken up than I was and he seemed to have something on his mind that was making him stare straight past me toward the Big Grayness.

I was staring in the opposite direction. "I'm all right," I assured him. "Just feel ... a little dizzy." I gestured toward the tractors on the far side of the square. "What's over there? Did the explosion come from there?"

He shook his head. "No. I told you it was miles from here, in the direction of the spaceport. That's the Endicott Administration Building, fuel conveyor sections and two-thirds of the distributing units. The tractors are all owned by Endicott. I backed this one out from between them and had just about gotten it turned around when the blast hit me."

"I know," I said. "I saw you. I wondered why only one tractor—"

That was as far as I got, because what hit me then was more jolting than any blast could have been, and it wasn't even physical. Just one word he'd let drop with a delayed-action fuse attached to it made me snap my head back and look at him in desperation. He had no way of knowing what was in my mind, but you don't think of that when you want someone to do you a favor that's of life-and-death importance to you.

I wanted him to withdraw that one word, to pretend at least that he hadn't said it. It didn't have to be true, he could have been just guessing.

The word was "spaceport." It couldn't matter that much to him, surely. It wasn't his wife but mine who was at the spaceport, and if he was wrong about where the explosion had taken place it would cost him nothing to be merciful and admit that he was far from sure about it.

But before I could hope to get such an admission out of him he sounded a knell to the granting of favors by saying: "Wendel technicians are activating Endicott fuel cylinders in different sections of the Colony. They're trying to turn the Colonists against Endicott by committing mass murder. The cylinders will only destroy an area of a few square miles, because they're not in the multiple-megaton, nuclear warhead category. We never thought they'd be turned into bombs."

Then came the knell. "We were warned about this, by a Colonist who's on his way to the spaceport with one of the cylinders. Or he may be there already. He just spoke to us briefly on the tele-communicator. That explosion came from the direction of the spaceport, but it may not be the one we were warned about. They may be trying to dismantle another cylinder at the spaceport right now. They won't succeed, because only an Endicott technician would know how to go about it."

"Do you know?"