helmet. "I must have put my finger over the lens. I'll be more careful." He made his way up onto the circular slab, stepping gingerly behind the body of the gun. He disappeared from view.

"Where did he go?" Nasha said irritably. "He'll get us all killed."

"Tance, come back!" Dorle shouted. "What's the matter with you?"

"In a minute." There was a long silence. At last the archeologist appeared. "I think I've found something. Come up and I'll show you."

"What is it?"

"Dorle, you said the gun was here to keep the enemy off. I think I know why they wanted to keep the enemy off."

They were puzzled.

"I think I've found what the gun is supposed to guard. Come and give me a hand."

"All right," Dorle said abruptly. "Let's go." He seized Nasha's hand. "Come on. Let's see what he's found. I thought something like this might happen when I saw that the gun was—"

"Like what?" Nasha pulled her hand away. "What are you talking about? You act as if you knew what he's found."

"I do." Dorle smiled down at her. "Do you remember the legend that all races have, the myth of the buried treasure, and the dragon, the serpent that watches it, guards it, keeping everyone away?"

She nodded. "Well?"

Dorle pointed up at the gun.

"That," he said, "is the dragon. Come on."

Between the three of them they managed to pull up the steel cover and lay it to one side. Dorle was wet with perspiration when they finished.

Between

"It isn't worth it," he grunted. He stared into the dark yawning hole. "Or is it?"

Nasha clicked on her hand lamp, shining the beam down the stairs. The steps were thick with dust and rubble. At the bottom was a steel door.

"Come on," Tance said excitedly. He started down the stairs. They watched him reach the door and pull hopefully on it without success. "Give a hand!"

"All right." They came gingerly after him. Dorle examined the door. It was bolted shut, locked. There was an inscription on 

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