Soon each pair was quarreling. They usually made up, pretty soon, and started loving again. But it petered out; each time more quickly. Meanwhile the two families had become interested in watching each other. When Jill had repulsed Jack, and he had moped about it awhile, he would begin staring at Arabella, over opposite, and trying to attract her attention. This got Jack in trouble all around. Arabella indignantly made faces at him and then turned her back; and as for Jill, she grew furious, and tore out his fur. But in the next stage, they even stopped hating each other. Each pair grew indifferent. Then the doctor put Jack in with Arabella, and Archer with Jill. Arabella promptly yielded to Jack. New devotion. More transports. Jill and Archer were shocked. Jill clung to the bars of her cage, quivering, and screaming remonstrance; and even blase Archer chattered angrily at some of the scenes. Then the doctor hung curtains between the cages to shut out the view. Jill and Archer, left to each other, grew interested. They soon were inseparable. The four monkeys, thus re-distributed, were now happy once more, and full of new liveliness and spirit. But before very long, each pair quarreled--and made up--and quarreled--and then grew indifferent, and had cynical thoughts about life. At this point, the doctor put them back with their original mates. And--they met with a rush! Gave cries of recognition and joy, like faithful souls re-united. And when they were tired, they affectionately curled up together; and hugged each other even at mealtime, and exchanged bits of food. This was as far as the doctor had gotten, at the time that I met him; and as I have lost touch with him since, I don't know how things were afterward. His theory at the time was, that variety was good for fidelity. "So how can _we_ help being that way? It's in the blood," he concluded. "Some creatures, such as wolves, are more serious; or perhaps more cold-blooded. Never mate but once. Well--we're not wolves. We can't make wolves our models. If we want to know how to behave, according to the way nature made us, if we want to know what is good for our instincts, we must study the monkeys." To be sure, these particular monkeys were living in idleness. This corresponds to living in high social circles with us, where men do not have to work, and lack some of the common incentives to home-building. The experiment was not conclusive. Still, even in low social circles-- XIII Are we or are we not simians? It is no use for any man to try to think anything else out until he has decided first of all where he stands on that question. It is not only in love affairs: let us lay all that aside for the moment. It is in ethics, economics, art, education, philosophy, what-not. If we are fallen angels, we should go this road: if we are super-apes, that.