"Not consciously," Brenton objected, as a flush crept up across his cheeks. "I have meant—"

The doctor interrupted, but not unkindly.

"Consciously or unconsciously, it's all one, Brenton, as concerns the output. You must bridle your scientific imagination and your tongue, or else you'll have the whole college by the ears. For the present, you are letting off harmless rockets. Before you know it, though, you'll be dynamiting the whole establishment. Best go slow."

Brenton attempted one last stand.

"Have I any right to go slow, doctor, when there's a principle involved? Have I any right to suppress eternal truths—"

Then the doctor lost his temper.

"Eternal pollywogs!" he burst out. "Man, you're daft. Who told you what truths are eternal? Who told you where science ends, and where theology begins? Who told you what we mean, when we say provable? For two thousand years, and then some more, we have been slowly sifting down a whole mass of ill-assorted beliefs into two great facts: Creator and created. For practical purposes, isn't that all we need to know? Isn't it all that we any of us can grasp: the surety that the Creative Mind would never have taken the trouble to fashion us, in the first place if he hadn't put inside us all the needful germs of progress, all the needful intellect to grasp the evident duty that lies just ahead? What else, then, do you need? No. Don't try to talk about it. Just go out and take a good, long walk in the fresh air, and forget your latter end in the more important concerns of deep breathing. You are getting disgustingly round-shouldered. Good bye. And, by the way, I'll tell Olive you will be back here to dinner."

But Brenton, going on his way, was totally oblivious to the doctor's sage counsel as to the merits of deep breathing. Neither did he realize in the least the splendid optimism of the stern old doctor's creed. For the hour, optimism was quite beyond his ken. He only realized that his own world had gone bad; that failure awaited him at every turn, not a downright and practical failure, either, but a nebulous and indeterminate futility. His life had been nothing but one restless struggle to arrive at something finite, something which should satisfy alike his heart and reason. Instead of gaining the one thing, it seemed to him that all had been lost. His present existence was as focusless as an eye after its lens has been extracted. His past had been opaque, his future would be permanently blurred. And for what good had been all the pain? It would have been far better, far more sane, if he had clung stoutly to the flaming horns of his hereditary Calvinism. Infinitely better to feel their scorching touch than to drift into a state of apathy past any feeling! And Brenton wondered vaguely whether he ever would feel anything again, anything, that is, as a personal issue, rather than as a scrap of the great world-plan. Most things, nowadays, left him conscious of being aloof, remote. Even the going away of his wife. Even the death of—He pulled himself up short. Not the baby's death. That was still personal, still very personal; personal was the message of those little waving hands. What did the baby see? Something denied for ever to his adult and doubting eyes?

Forgetful of the doctor's invitation to come back to dine, Brenton at twilight found himself upon the long white bridge, his elbows on the rail, his eyes upon the darkening surface of the river, as it swept down upon him from out the purpling hills. As of old, its mystery held him, the mystery of its ceaseless coming, the mystery of its ceaseless going on and on, until it lost all individual existence in the soundless, boundless sea. To-night, in the apathy which held his senses in subjection, he watched it through the dying twilight, until it ceased to be to him a river, but appeared to him as an embodiment of life itself, coming, coming, coming down to him out of the purpling distance, going, going, going down away from him into the deepening shadows. And then the light died, and darkness crept across it all, and then—extinction.

Next morning, he arranged it with Professor Opdyke that, for the present, the other assistant should take over all of his lectures, while he himself would put in his time inside the laboratory.