"Quillan," a tiny voice said from the viewer.

He turned, took two steps, and sat down fast before the viewer. "Go ahead!"

"Fast motion in B section. Going your way."

Fast motion. A thought flicked up. "Quillan—" Trigger began.

He raised a shushing hand. "Get a silhouette?" he asked. His hands went to a set of control switches and stayed there.

"No. Pickup shows a haze like in the reconstruct." An instant's pause. "Leaving B section."

"Motion in C section," said another voice.

Quillan said, "All right. It's coming. No more verbal reports unless it changes direction. If you want to stay alive, don't move unless you're in armor."

There was silence. Quillan sat unmoving, eyes fixed on the screen. Trigger stood just behind him. Her legs had begun to tremble. She'd better tell him.

"Quillan—"

For an instant, in the screen, there was something like heat shimmer at the far end of the passage. Then she saw her cabin door pop open.

The interior of the cabin showed in a brief flare of blue light. In it was a shape. It vanished instantly again.

She heard Quillan make a shocked, incredulous sound. His left hand slashed at a switch on the panel.

Twenty feet from them, just behind the closed door to the passage, was a splatting noise like a tremendous slap. Then another noise, strangely like a brief cloudburst. Then silence again.

She realized Quillan was on his feet beside her, the oversized gun in his hand. It was pointed at the door. His eyes switched suddenly from the door to the screen and back again. She felt him relaxing slowly. Then she discovered she was clutching a handful of his shirt along with a considerable chunk of tough skin. She went on clutching it.

"Fly swatter got it!" he said. "Whew!" He looked down and patted the clutching hand. "No catassin! The trap in the cabin just wasn't fast enough. Had a gravity mine outside our door, just in case. That was barely fast enough!" For once, Quillan looked almost awed.

"L-l-l-like—" Trigger began. She tried again. "Like a little yellow man—"

"You saw it? In the cabin? Yes. Never saw anything just like it before!"

Trigger pressed her lips together to make them stay steady.

"I have," she said. "That's what I was trying to tell you."

Quillan stared at her for an instant. "You'll tell me about it in a couple of minutes. I've got some quick work to do first." He checked himself. A wide grin spread suddenly over his face. "Know something, doll?"

"What?"

"The damn computers!" Major Quillan said happily. "They goofed!"

The gravity mine would have reduced almost any life-form which moved into its field to a rather thin smear, but there wasn't even that left of the yellow demon-shape. Something, presumably something it was carrying, had turned it into a small blaze of incandescent energy as the mine flattened it out. Which explained the sound like a cloudburst. That had been the passage's automatic fire extinguishers going into brief but correspondingly violent action.

Quillan's group stayed out of sight for the time being. He'd barely got the mine put away, along with a handful of warped metal slugs, which was what the mine had left of their attacker's mechanical equipment, and Trigger's cabin door locked again, when three visitors came zooming down the storerooms hall in a small car. A ship's engineer and two assistants had arrived to check on what had started the extinguishers.

"They may," Quillan said hopefully, "just go away again." He and Trigger were watching the engineers through the viewer which had been extended to cover their end of the passage.

They didn't just go away again. They checked the extinguishers, looked at the floor, still wet but rapidly absorbing the last drops of the brief deluge. They exchanged puzzled comment. They checked everything once more. Finally the leader made use of the door announcer and asked if he might intrude.

Quillan switched off the viewer. "Come in," he said resignedly.

The door opened. The three glanced at Quillan, and then at Trigger-plus-Beldon. Their eyes widened only slightly. Duty on the Dawn City produced hardened men.

Neither Quillan nor Trigger could offer the slightest explanation as to what had started the extinguishers. The engineers apologized and withdrew. The door closed again.