"A year is a measure of time," the old man explained. "When we left Earth it was the year twenty-two hundred."
"We have nothing like that here," said Ro, still puzzled. "But tell me, about this speaking with the mind. Perhaps I shall understand that."
"It's simple telepathy. We have mastered the science on Earth. It takes study from childhood, but once you have mastered the art, it is quite simple to transmit or receive thoughts from anyone. A mere matter of concentration. We—who speak different tongues—understand each other because of action we have in mind as we speak. We want the other to walk, we think of the other walking. A picture is transmitted and understood. It is a message in a Universal language."
Ro sighed.
"I am afraid we are very backward here on Mars," he said wearily. "I would like to learn more, but we must sleep now. Tomorrow will be a very busy day."
Ro slipped his arm about Na's shoulder and drew her closer. With their heads together they slept.
Ro awakened with the dawn. He was startled to find that Na had left his side. He rose quickly and strode to the mouth of the cave.
Na met him at the entrance. She was returning from a clump of trees a short distance away. Her arms were loaded with Manno, the fruit of Mars, and clusters of wild berries and grapes.
"You see," she said, "I will make you a good mate. Our table will be well provided for."