had dreamed only a short time ago, but fighting off the actual recollection of the dream.

"Let yourself go," Dr. Martin said kindly. "Don't fight it—"

A fragment of his mind let down its guard for a brief instant. It was like touching the surface of a whirlpool. He was sucked into the sweeping depths of the dream. He sensed that he cried out in terror as he plunged. But there was no one to hear. He was alone in space.

Fear wrapped him like black, clammy fur. He felt the utter futility of even being afraid. He would simply remain as he was, and soon he would cease to be.

But they were coming again. He sensed, rather than saw them. The searchers. And his fear of them was greater than his fear of space alone. He moved. Somehow he moved, driving headlong through great vastness while the pinpoints of light grew behind him.

"Very satisfactory," Dr. Martin was saying. "An extremely satisfactory probe."

His voice came through to Mel as from beyond vast barriers of time and space. Mel felt the thick sweat that covered his body. Weakness throbbed in his muscles.

"It gives us a very solid anchor point," Dr. Martin said. "From here I think we run back to the beginning of the experience and unearth the whole thing. Are you ready, Mr. Hastings?"

Mel felt too weak to nod. "Let 'er rip!" he muttered weakly.

The day was warm and sunny. He and Alice had arrived early at the spaceport to enjoy the holiday excitement preceding the takeoff. It was something they had both dreamed of since they were kids—a vacation in the fabulous domed cities and ruins of Mars.

Alice was awed by her first close view of the magnificent ship lying in its water berth that opened to Lake Michigan. "It's huge—how can such an enormous ship ever get off the Earth?"

Mel laughed. "Let's not worry about that. We know it does. That's all that matters." But he could not help being impressed, too, by the enormous size and the graceful lines of the luxury ship. Unlike Alice, he was not seeing it at close range for the first time. He had met the ship scores of times in his reporting job, interviewing famous and well-known personages as they departed or arrived from the fabulous playgrounds of Mars.

"If you look carefully," Mel pointed out, "you'll see a lot of faces that make news when they come and go."

Alice's face glowed as she clung to Mel's arm and recognized some of the famous citizens who would be their fellow passengers. "This is going to be the most fun we've ever had in our lives, darling."

"Like a barrel of monkeys," Mel said casually, enjoying the bubbling excitement that was in Alice.

The ship was so completely stabilized that the passengers did not even have to sit down during takeoff. They crowded the ports to watch the land and the water shoot past as the ship skimmed half the length of Lake Michigan in its takeoff run. As it bore into the upper atmosphere on an ever-increasing angle of climb, its own artificial gravity system took over and gave the illusion of horizontal flight with the Earth receding slowly behind.

Mel and Alice wandered through the salons and along the spacious decks as if in some fairyland-come-true. All sense of time seemed to vanish and they floated with the great ship in timeless, endless space.

He wasn't quite certain when he first became aware of his own sense of disquietude. It seemed to result from a change in the members of the crew. On the morning of the third day they ceased their universal and uninterrupted concern for their passengers' entertainment and enjoyment.

Most of the passengers seemed to have taken no note of it. Mel commented to Alice. She laughed at him. "What do you expect? They've spent two full days showing us the ship and teaching us to play all the games aboard. You don't expect them to play nurse to us during the whole trip, do you?"

It sounded reasonable. "I suppose so," said Mel dubiously. "But just what are they doing? They all seem to be in such a hurry to get somewhere this morning."

"Well, they must have some duties to perform in connection with running the ship."

Mel shook his head in doubt.

Alice joined him in wandering about the decks, kibitzing on the games of the other passengers, and watching the stars and galaxies on the telescopic screens. It was on one of these that they first saw the shadow out in space. Small at first, the black shadow crossed a single star and made it wink. That was what caught Mel's attention, a winking star in the dead night of space.

When he was sure, he called Alice's attention to it. "There's something moving out there." By now it had shape, like a tiny black bullet.

"Where? I don't see anything."

"It's crossing that patch of stars. Watch, and you can see it blot them out as it moves."

"It's another ship!" Alice exclaimed. "That's exciting! To think we're passing another ship in all this great emptiness of space! I wonder where it's coming from?"

"And where it's going to."

They watched its slow, precise movement across the stars. After several minutes a steward passed by. Mel hailed him and pointed to the screen. "Can you tell us what that other ship is?"

The steward glanced and seemed to recognize it instantly. But he paused in replying. "That's the Mars liner," he said finally. "In just a few minutes the public address system will announce contact and change of ship."

"Change of ship?" Mel asked, puzzled. "I never heard anything about a change of ship."

"Oh, yes," the steward said. "This is only the shuttle that we're on now. We transfer to the liner for the remainder of the trip. I'm sure that was explained to you at the time you purchased your tickets." He hurried away.

Mel was quite sure no such thing had been explained to him when he purchased tickets. He turned back to the screen and watched the black ship growing swiftly larger now as it and the Martian Princess approached on contact courses.

The public address system came alive suddenly. "This is your Captain. All passengers will now prepare to leave the shuttle and board the Mars liner. Hand luggage should be made ready. All luggage stowed in the hold will be transferred without your attention. It has been a pleasure to have you aboard. Contact with the liner will be made in fifteen minutes."

From the buzz around him Mel knew that this was as much a surprise to everyone else as it was to him, but it was greeted with excitement and without question.

Even Alice was growing excited now and others crowded around them when it was discovered what they were viewing. "It looks big," said Alice in subdued voice. "Bigger than this ship by far."

Mel moved away and let the others have his place before the screen. His sense of uneasiness increased as he contemplated the approach of that huge black ship. And he was convinced its color was black, that it was not just the monotone of the view screen that made it so.

Why should there be such a transfer of passengers in mid-space? The Martian Princess was certainly adequate to make the journey to Mars. Actually they were more than a third of the way there, already. He wasn't sure why he felt so certain something was amiss. Surely there was no possibility that the great Connemorra Lines would plan any procedure to the detriment of the more than five thousand passengers aboard the ship. His uneasiness was pretty stupid, he thought.

But it wouldn't go away.

He returned to the crowd clustered at the viewing screen and took Alice by the arm to draw her away.

She looked quizzically at him. "This is the most exciting thing yet. I want to watch it."

"We haven't got much time," Mel said. "We've got a lot of things to get in our suitcases. Let's go down to our stateroom."

"Everyone else has to pack, too. There's no hurry."

"Fifteen minutes, the Captain said. We don't want to be the last