She took him to the living quarters occupied by her brother and herself, where opal walls and jewelled inlays were made lovely by the soft light that flooded the rooms.

“Just one tablet,” she said, and brought him a thin white disc, “then plenty of water. You must take this compressed food often and in small quantities till your system is accustomed.”

“You make this?” he asked.

“But certainly. Our chemists are learned men. We should lack for food, otherwise, here in our underground home.”

He let the tablet dissolve in his mouth. Althora leaned forward to touch his hand gently.

“I am sorry,” she said, “that you and Djorn fail to understand one another. He is good—so good! But you—you, too, are good, and you fear for the safety of your own people.”

“They will be killed to the last woman and child,” he replied, “or they will be captured, which will be worse.”

“I understand,” she told him, and pressed his hand; “and if I can help, Lieutenant Mack Guire, I shall be so glad.”

He smiled at her stilted pronunciation of his name. He had had the girl for an almost constant companion since his arrival; the sexes, he found, were on a level of mutual freedom, and the girl’s companionship was offered and her friendship expressed as openly as might have been that of a youth. Of Sykes he saw little; Professor Sykes was deep in astronomical discussions with the scientists of this world.