hile they tangled, both blocked, Darbor slipped past them and stood outside the entrance. She was exposed, a clear target. But the men below dared not fire until they knew where Caltis was, what had happened to him. She held the enemy at bay. Gun ready, Darbor faced down the slopes. It was not necessary to pull trigger. Not for the moment. She waited and hoped and dared someone to move.

Neither man gave first. It was the weakened timbering that supported the gallery roof. Loose stones rained down. Dry, cold and brittle wood sagged under strain. Both wild shots had taken shattering effect. Timbers yielded, slowly at first, then faster. Showering of loose stones became a steady stream. A minor avalanche.

Darbor heard the sound or caught some vibration through her helmet microphones. The men were too involved to notice. Caltis heard her. He got a cruel nosehold, twisted Denver's nose like an instrument dial. Denver screamed, released his grip. In the scramble, his foot slipped. Darbor cried out shrill warning.

Breaking free, Caltis bolted in panic toward the entrance.

The fall of rock was soundless. It spilled down in increasing torrents. Larger sections of ceiling were giving away.

Above the prostrate Denver hovered a poised phantom of eerie light. Charley, bored, had gone to sleep. Awakening, he found a game still going on. A fine new game. It was fascinating. He wanted to join the fun. Like an angle of reflected light cast by a turning mirror, he darted.

The running figure aroused his curiosity. Charley streamed through the collapsing gallery. He caught up with Caltis just inside the entrance. With a burble of insane, twittering glee, he went into action. It was all in the spirit of things. Just another delightful game.

Like a thunderbolt he hurtled upon Caltis, tangled with him. It was absurd, insane. Man and moondog went down together in a silly sprawl. Sparks flew, became a confused tesseract of luminous motion. Radiance blazed up and danced and flickered and no exact definition of the intertwined bodies was possible. Glowing lines wove fat webs of living color. It was too swift, too involved for any sane perception.

A wild, sprawling of legs, arms and body encircled and became part of the intricacies of speeding, impossible light.

It was a mess.

Some element or combination of forces in Charley, inspired by excitement and sheer delight, made unfortunate contact with ground currents of vagrant electricity. Electricity ceased to be invisible. It became sizzling, immense flash, in which many complexities made part of a simple whole. It was spectacular but brief. It was a flaming vortex of interlocked spirals of light and color and naked force. It was fireworks.

And it was the end of Big Ed Caltis. He fried, and hot grease spattered about him. He sizzled like a bug on a hot stove.

When Denver reached the entrance, man and moondog lay in a curious huddle of interrupted action. It was over.

Charley was tired, but he still lived and functioned after his curious fashion. For the moment, he had lost interest in further fun and games. He lay quietly in a corner of rough rock and tried to rebuild his scattered and short-circuited energies. He pulsed and crackled and sound poured in floods of muffled static from the earphones in Denver's helmet.

But this was no time for social amenities. Big Ed Caltis was dead, very dead. But the others down the slope were still alive.

Like avenging angels, Denver and Darbor charged together down the slope. Besiegers scattered and fled in panic as twinned beams of dreadful light and heat scourged their hiding places. They fled through the grotesque shadow patterns of Lunar night. They fled back, some of them, to the black ship which had brought them. And there, they ran straight into the waiting arms of a detail from Space Patrol headquarters.

---

od Denver's friend, the watchman, had talked. From spaceport he had called the Space Patrol and talked where it would do some good. A bit late to be of much use, help had arrived. It took the Space Patrol squads a half hour to round up the scattered survivors.

Darbor went back to the mine-buildings with the Space Patrol lieutenant as escort. Denver trudged wearily back up the slope to recover Charley.

The moondog was in a bad way. He bulged badly amidships and seemed greatly disturbed, not to say temperamental. With tenderness and gentle care, Denver cradled the damaged Charley in his arms and made his way back to the living shack at the mine. Space Cops were just hustling in the last of the prisoners and making ready to return to civilization. Denver thanked them, but with brief curtness, for Charley's condition worried him. He went inside and tried to make his pet comfortable, wondering where one would look on the Moon for a veterinary competent to treat a moondog.

Darbor found him crouched over Charley's impoverished couch upon the metal table.

"I want to say goodbye," she told him. "I'm sorry about Charley. The lieutenant says I can go back with them. So it's back to the bright lights for me."

"Good luck," Denver said shortly, tearing his attention from Charley's flickering gyrations. "I hope you find a man with a big fat bankbook."

"So do I," Darbor admitted. "I could use a new wardrobe. I wish it could have been you. If things had worked out—"

"Forget it," Denver snapped. "There'd have been Martin's kid. She'd have got half anyhow. You wouldn't have liked that."

Darbor essayed a grin. "You know, I've been thinking. Maybe the old guy was my father. It could be. I never knew who my old man was, and I did go to school on Earth. Reform school."

Denver regarded her cynically. "Couldn't be. I'm willing to believe you don't know who your father was. Some women should keep books. But that kid's not Martian."

Darbor shrugged. "Doesn't matter. So long, kid. If you make a big strike, look me up."

The Space Patrol lieutenant was waiting for her. She linked arms with him, and vanished toward the ship. Denver went back to Charley. Intently he studied the weird creature, wondering what to do.

A timid knock startled him. For a moment, wild hope dawned. Maybe Darbor—

But it wasn't Darbor. A strange girl stood in the doorway. She pushed open the inner flap of the airlock and stepped from the valve.

"I was looking around," she explained. "I bummed my way out with the Patrol Ship. Do you mind?"

Denver scowled at her. "Should I?"

The girl tried a smile on him but she looked ill-at-ease. "You look like one of the local boy scouts," she said. "How about helping a lady in distress?"

"I make a hobby of it," he snarled. "I don't even care if they're ladies. But I'm fresh out of romance and slightly soured. And I'm worried about the one friend who's dumb enough to stick by me. You picked a bad time to ask. What do you want?"

The girl smiled shyly. "All right, so you don't look like a boy scout. But I'm still a girl in a jam. I'm tired and broke and hungry. All I want is a sandwich, and maybe a lift to the next town. I should have gone back with the Patrol ship but I guess they forgot me. I thought maybe, if you're going somewhere that's civilized, I could bum a lift. What's wrong with your friend?"

Denver indicated Charley. "Frankly, I don't know." He balked at trying to explain again just what a moondog was. "But who are you? What did you want here?"

The girl stared at him. "Didn't you know? I'm Soleil. My father owned this mine. He thought he'd found something, and sent for me to share it. It took the last of our money to get me here, but I wanted to come. We hadn't seen each other for twenty years. Now he's dead, and I'm broke, alone and scared. I need to get to some place where I can dream up an eating job."

"You're Martin's kid?"

Soleil nodded, absently, looking at Charley. The moondog gave a strange, electronic whimper. There was an odd expression on the girl's face. A flash of inspiration seemed to enlighten her.

"I'll take care of this," she said softly. "You wait outside."

Somewhat later, after blinding displays of erratic lightnings had released a splendor of fantastic color through the view-ports to reflect staggeringly from the mountain walls, a tired girl called out to Tod Denver.

She met him inside the airlock. In her arms snuggled a pile of writhing radiance, like glowing worms. Moonpups. A whole litter of moonpups.

"They're cute," Soleil commented, "but I've never seen anything quite like this before."

"It must have been a delayed fuse," said Denver, wilting. "Here we go again."

He fainted....

---

wakening was painful to Denver. He remembered nightmare, and the latter part of his memory dealt with moonpups. Swarms of moonpups. As if Charley hadn't been enough. He was not sure that he wanted to open his eyes.

He thought he heard the outer flap of the airlock open, then someone pounding on the inner door. Habit of curiosity conquered, and his eyelids blinked. He looked up to find a strange man beside his bed. The man was fat, fussy, pompous. But he looked prosperous, and seemed excited.

Denver glanced warily about the room. After all, he had been strained. Perhaps it was all part of delirium. No sign of the girl either. Could he have imagined her, too? He sighed and remembered Darbor.

"Tod Denver?" asked the fat, prosperous man. "I got your name from a Sergeant of Security Police in Crystal City. He says you own a moondog. Is that true?"

Denver nodded painfully. "I'm afraid it is. What's the charge?"

The stranger seemed puzzled, amused. "This may seem odd to you, but I'm in the market for moondogs. Scientific laboratories all over the system want them, and are paying top prices. The most unusual and interesting life form in existence. But moondogs are scarce. Would you consider parting with yours? I can assure you he'll receive kind treatment and good care. They're too valuable for anything else."

Denver almost blanked out again. It was too much like the more harrowing part of his dreams. He blinked his eyes, but the man was still there.

"One of us is crazy," he mused aloud. "Maybe both of us. I can't sell Charley. I'd miss him too much."

Suddenly, as it happens in dreams, Soleil Martin stood beside him. Her arms were empty, but she stood there, smiling.

"You wouldn't have to sell Charley," she said, giving Denver a curious, thrusting glance. "Had you forgotten that you're now a father, or foster-grandfather, or something. You have moonpups, in quantity. I had to let you lie there while I put the little darlings to bed. And it's not Charley any more, please. Charlotte. It has to be Charlotte."

Denver paled and groaned. He turned hopefully to the fat stranger.

"Say, mister, how many moonpups can you use?"

"All of them, if you'll sell." The man whipped out a signed, blank check, and quickly filled in astronomical figures. Denver looked at it, whistled, then doubted first his sanity, then the check.

"Take them," Denver murmured. "Take them, quick, before you change your mind, or all this evaporates in dream."

A moondog has no nerves. Charley—or Charlotte—had none, but the brood of moonpups had already begun to get on whatever passed for nerves in his electronic make-up. He was glad and relieved to be rid of his numerous progeny. He, or she, showed passionate and embarrassing affection for Denver, and even generously included Soleil Martin in the display.

Denver stared at her suddenly while she helped the commission agent round up his radiant loot and make ready for the return to town. It was as if he were seeing her for the first time. She was pretty. Not beautiful, of course. Just pretty. And nice. He remembered that he was carrying her picture in his pocket.

She was even an Earth-girl. They were almost as scarce in the moon colonies as moondogs.

"Look here," he said. "I have money now. I was going out prospecting but it can wait. I kind of inherited you from your father, you know. Do you need dough or something?"

Soleil laughed. "I need everything. But don't bother. I haven't any claim on you. And I can ride back to the city with Mr. Potts. He looks like a better bet. He can write such big checks, too."

Denver made a face of disgust. "All women are alike," he muttered savagely. "Go on, then—"

Soleil frowned. "Don't say it. Don't even think it. I'm not going anywhere. Not till you go. I just wanted you to ask me nice. I'm staying. I'll go prospecting with you. I like that. Dad made me study minerals and mining. I can be a real help. With that big check, we can get a real outfit."

Denver stopped dreaming. "But you don't know what it's like out there. Just empty miles of loneliness and heat and desert and mountains of bare rock. Not even the minimum comforts. Nights last two Earth weeks. There'd just be you and me and Charlotte."

Soleil smiled fondly. "It listens good, and might be fun. I like Charlotte and you. I'm realistic and strong enough to be a genuine partner."

Tod Denver gasped. "You sure know what you want—Partner!" He grinned. "Now we'll have a married woman along. I was worried about wandering around, unprotected, with a female moondog—"

Soleil laughed. "I think Charlotte needs a chaperone."

---