"But this is marvelous. It's almost as complete as my own lab. Now who built this place, Tyr? Can you tell me?"
He showed her a big book bound in tooled leather.
"William Rohrig!" she cried at sight of the golden letters stamped into the cover. "Why—why, he was an ardth genius! We often wondered what became of him! He was to travel to Antares, to study life conditions on one of its outer planets. Commander Mason would be delighted—"
She broke off, glancing sideways at Tyr.
He said, "If it were not for me, you could go back. You could go anyhow. I—"
Her white palm covered his mouth. "Don't say it, Tyr. We'll see this through, you and I."
"If there were only some way in which I could convince the ardth that they and the Trylla could live in peace! The Trylla mistrust me and the ardth hate me, for I threaten their power. Katha, Katha! There is no answer."
"There is always an answer to a problem. The only trouble is, it takes a long time to see it."
While Tyr worked at the table, making tests and experiments under Katha's guidance, to test the powers of his mind, Katha made the tower her own. Sunlight bathed Tyr through an open window. Above him he heard her footsteps going to and fro, heard her lifting things, and the squeals of delight when she unearthed notebooks that had once been Rohrig's.
They spent their days in work and laughter. Katha made many tests on him, saying, "You are a biological miracle, darling. I don't know much about miracles, so I have to learn, slowly and gropingly."