_Wallahi!_ but his leader had taste, the sentry decided.

"Pa.s.s," he said gruffly. Even a vizier of such importance as this one must need solace at times, he decided philosophically.

She slipped past silently to the tent entrance where the Tuareg guard noticed she paused for a long moment before entering. He grinned into his teguelmoust. Aiii, the little bird was timid before the hawk.

She stood for a moment listening, and then slipped inside, dropping the desert musical instrument to the ground. Dave Moroka's back was to her and even as she entered he flicked off the switch of the video-radio into which he had been speaking and scowled at it.

When he stood and began to turn, she covered him with the small pocket pistol. She had an ease in handling it which denoted competence.

His eyebrows went up, but he remained silent, waiting for her gambit.

Isobel said evenly, "You're a Party member, aren't you, Dave?"

"Why do you say that?"

She nodded infinitesimally to the set. "You were reporting just now. I heard enough just as I came in."

He took in her disguise. "My guard isn't as efficient as I had thought," Dave said wryly.

Isobel said, "You knew Abe Baker, didn't you?"

He looked at her, expressionlessly.

She said, "I already knew you belonged to the Party, Dave. No matter how competent an agent, it's something difficult to hide from any other long-time member. There's a terminology you use--such as calling it the Soviet Union, rather than Russia. No commie ever says Russia, it's always _the Soviet Union_. You can tell, just as a Roman Catholic can tell a person raised in the Church, even though the other has dropped away, or even as one Jew can tell another. Yes, I've known you were a Party member for some time, Dave."

"And?" the South African said.

"Why are you here?"

Dave Moroka said, "For the same reason you are, to further the El Ha.s.san dream, the uniting and modernization of the continent of my racial heritage."

"But you are still a Party member and still report to your superiors."

Dave Moroka looked at the tiny gun she held in her hand.

"Don't try it," she said. "I have seen you in action, Dave. I have never seen a man move so ruthlessly fast ... but don't try it."

"No reason to," he bit out. "Come on, let's go see Homer."

She was slightly taken aback, but not enough to release her control for even a split second. "Lead the way," she said.

Even at this time of evening, the headquarters tent was brightly lit and most of the immediate El Ha.s.san staff still at work. Homer Crawford looked up as they entered.

Cliff Jackson saw the gun first and said, "Holy Mackerel, Isobel."

Fredric Ostrander was sitting to one side in discussion with the sober faced Jack Peters. He took in the gun and slowly came to his feet, obviously expecting climax.

Isobel said, "Dave's taking over control of communications had method.

I just found him reporting to what must have been a superior ... in the Party."

Homer Crawford looked from the South African to Isobel, then back to Dave again, without speaking. His eyes were questioning.

Dave said, his voice sharp. "I haven't time for details now. Isobel's right. I was a Party member."

"Was?" Ostrander chuckled. "That's the understatement of the year. I hadn't got around to revealing the fact as yet, but our friend Dave is the notorious Anton, one of the Soviet Complex's most competent hatchetmen."

Dave looked at him only briefly. "Was," he reiterated. He turned his attention to Homer and to Bey, who was staring tired dismay at this new addition to the load.

Homer still held his peace, waiting for the other to go on.

"I found out tonight why Colonel Ibrahim is attacking, instead of pulling in his horns as reason would dictate." Dave paused for emphasis. "The Soviet Complex has thrown its weight, in this matter at least, on the side of the Arab Union. They have insisted that Sven Zetterberg be dismissed as head of the Sahara Division of the African Development Project and that his threat to use Reunited Nations aircraft if the local fighting spreads to the air, be repudiated."

Kenny blurted, "Good grief ... that means--"

Dave looked around at them, one by one. "It means," he said, "that the Arab Legion is going to be reinforced tomorrow morning by a full regiment of paratroopers."

"Holy Mackerel," Cliff groaned. "We've had it. Another regiment of crack troops in Tamanra.s.set and we'll _never_ take the town."

Dave shook his head. "That's not the big thing. The paratroopers aren't going to drop in Tamanra.s.set. They're going to hit every oasis, every water hole, in a circ.u.mference of two hundred miles."

There was an empty silence.

Homer Crawford said finally, evenly, "In the expectation that every follower of El Ha.s.san in the Sahara will either surrender or die of thirst, eh?" He didn't seem sufficiently impressed by the threatening disaster. He looked at Dave questioningly. "Why do you bother to tell us, Dave, if you're on the other side?"

Dave grunted sour amus.e.m.e.nt. "Because I've just become a full member of the team. I resigned from the Party tonight."

"Brother," Bey said, "you sure pick a h.e.l.luva time to join up." He obviously was expressing the opinions of the majority.

Homer Crawford came to his feet and looked around at them. "All right," he said. "A new complication. Let's face up to it. There's always an answer. We're in the clutch, let's fight our way out."

Largely, they stared at him, but he ignored their dismay. He looked from one to the other. "We need some ideas. Let's kick it around.

Isobel, Cliff, Jack, Kenny--?" His eyes went from one to the other.

Obviously his own mind was churning.

They shook their heads dumbly.

Kenny said, "Ideas! We've had it, Homer!"

Homer Crawford spun on him and now the force they all knew was emanating from him. He laughed his scorn. "A month ago we were half a dozen fugitives. Now we're an army besieging a city. And you say we've had it? Listen, Kenny, if we have to we'll go back to being half a dozen fugitives again--those of us that are left. But the dream goes on! However, we're not going to have to. We're too near victory in this stage of the operation to sit down on the job because of a threatened reverse. Now then, let's kick it around. Jimmy! Dave!

Kenny! Ostrander!"

Fredric Ostrander raised his eyebrows only slightly at being included in their number.

Bey, for once, was seemingly too exhausted to be brought to new enthusiasm. He tossed a detail map of Tamanra.s.set to the table. "And I'd just worked out a bang-up scheme for infiltrating into town, joining up with our adherents there, and seizing it while most of Ibrahim's men were out in the desert, trying to capture our nearer water holes."