Abruptly the man turned into a building. He was out of sight when Cassal reached the structure.

He stood at the entrance and stared in disappointment. "Opportunities Inc.," Dimanche quoted softly in his ear. "Science, thrills, chance. What does that mean?"

"It means that we followed a gravity ghost!"

"What's a gravity ghost?"

"An unexplained phenomena," said Cassal nastily. "It affects the instruments of spaceships, giving the illusion of a massive dark body that isn't there."

"But you're not a pilot. I don't understand."

"You're not a very good pilot yourself. We followed the man to a gambling joint."

"Gambling," mused Dimanche. "Well, isn't it an opportunity of a sort? Someone inside is thinking of the money he's winning."

"The owner, no doubt."

Dimanche was silent, investigating. "It is the owner," he confirmed finally. "Why not go in, anyway. It's raining. And they serve drinks." Left unstated was the admission that Dimanche was curious, as usual.