It was little different from the other time. There was the same holiday excitement in the crowd of vacationers and those who had come to see them off. It was the same ship, even.

All that was different was the absence of Alice.

He stayed in his stateroom and didn't watch the takeoff. He felt the faint rocking motion as the ship went down its long waterway. He felt the shift as the artificial gravity took over. He lay on the bed and closed his eyes as the Martian Princess sought the cold night of space.

For two days he remained in the room, emerging only for meals. The trip itself held no interest for him. He waited only for the announcement that the black ship had come.

But by the end of the second day it had not come. Mel spent a sleepless night staring out at the endless horizon of stars. Dr. Martin had been right, he thought. There was no black ship. He had merely substituted one illusion for another. Where was reality? Did it exist anywhere in all the world?

Yet, even if there were no black ship, his goal was still Mars.

The third day passed without the appearance of the black ship. But on the very evening of that day the speaker announced: "All passengers will prepare for transfer from the shuttle ship to the Mars liner. Bring hand luggage—"

Mel sat paralyzed while he listened to the announcement. So it was true! He felt the faint jar that rocked the Martian Princess as the two ships coupled. From his stateroom port Mel could see the stranger, black, ugly, and somehow deadly. He wished he could show Dr. Martin this "illusion"!

He packed swiftly and left the room. Mel joined the surprised and excited throng now, not hanging back, but eager to find out the secret of the great black ship.

The transition from one ship to the other was almost imperceptible. The structure of both corridors was the same, but Mel knew when the junction was crossed. He sensed the entry into a strange world that was far different from the common one he knew.