Manuel stared at Roberto in amazement. He had always harboured a certain suspicion that there was something wrong with the student's head.
"No. Don't imagine this is silly talk. I'm on the trail of a fortune,—a huge fortune. If you help me, I'll remember you."
"Sure. What do you want me to do?"
"I'll tell you when the right moment comes."
Manuel could not conceal an ironic smile.
"You don't believe it," muttered Roberto.
"That doesn't matter. When you'll see, you'll believe."
"Naturally."
"If I should happen to need you, promise you'll help me."
"I'll help you as far as I am able," replied Manuel, with feigned earnestness.