A thought knocked at her mind, but she resolutely shut it out, refused it even silent verbalization. Yet, while she stooped over again and busied her hands with stripping the rice from the stalks without cutting them on the sharp dry leaves, she found herself thinking about Mendelian law. Line breeding from father to daughter, or brother to sister--in domestic animals, of course--was all right in fixing desirable traits, providing certain recessives in both the dam and the sire did not thus become dominant. "There, Katheryn Kittredge," she mumbled with satisfaction. "Assuming the responsibilities of domesticity has not made you forget what you learned." But the danger of fixing recessives into dominants through inbreeding was even less with half-brothers and sisters. Now daughters by one--er--sire could be bred to another sire to get only a quarter relationship to a similar cross from the other father--er--sire. She must work it out with a stylus in smooth clay. The boys had preempted every scrap of paper for their pointless calculations. But she could remember it, and it would be valuable in breeding up a desirable barnyard stock. Yet it was odd that she assumed two males and only one female! * * * * * Then and there, standing ankle deep in the bog of wild rice, muddy to her knees in her torn coveralls, slapping at persistent mosquitoes, she came to terms with herself. In the back of her mind she had known it all the time. All this was without meaning unless there was Man--and a continuity of Man. Even so little as this gathering of wild rice, before the migrating ducks got it, was without meaning, if it were merely to stave off death from a purposeless existence. If there were no other fate for them than eventually to die, without posterity, then they might as well die tomorrow, today, now. The men were still living in a dream of getting back. No doubt their lusting appetites were driving them to get back to their brazen, heavy-breasted, languorous-eyed hussies who pandered to all comers without shame! Miss Kitty was astonished at her sudden vehemence, the red wave of fury which swept over her. But of course she was right. That was their urgent drive. "A male human is nothing more than a sex machine!" Wasn't that what her roommate at college had once said? Or was it her maiden aunt who had dominated her widowed mother and herself through all the years she was growing up? What did it matter who said it? She knew it was true. No wonder they were so anxious to get back to Old Earth! Her lip lifted in cynical scorn. "You don't dare leave a young girl alone with a boy for five minutes," her aunt had once complained bitterly. "All they ever think about is...." her voice had dropped to a whisper and she had given that significant look to Katheryn's mother. But Katheryn had known what she meant, of course. And it was true of all men.