These, or something very much like these, were the thoughts that filled the soul of the unhappy, the despairing Corbet, as he rolled his venerable eyes over the wide waste of waters, and saw that the Petrel was gone. It was a moment full of deeper misery and keener anguish than any which the good captain had ever known in the whole course of his life, though that life had by no means been without its sufferings. Yet among all the sufferings and sorrows of a life full of vicissitudes, it had never fallen to his lot to experience such a misfortune as this,--to reproach himself so keenly, so severely, and yet so justly. Whatever the fate of the boys might have been, he knew perfectly well that he, and he alone, was the cause; nor could he plead, even to his own conscience, the excuse that his motives were right. For his motives were not right, and he knew it. His motives had been nothing better than wild desires for sudden wealth. True, he had only wished that wealth for his “babby;” but that did not in the least mitigate his offence. At the very least, he had been guilty of carelessness so gross that it was hardly inferior to downright, deliberate crime. So the poor captain’s anguish of soul was extreme, and utter, as well it might be. So keen, indeed, was his suffering, that his hair might have turned white from its severity,--a circumstance not unusual,--but in the captain’s case it was not possible, since, as is well known, his hair was already as gray as it well could be, and therefore the good Captain Corbet could only suffer in secret, and occasionally wipe away the tears that dropped from his eyes with the sleeve of his venerable coat. At length the thought occurred to him that perhaps he had not come to the right place. To his mind, the thought was well nigh inconceivable; yet, after all, it was barely possible, and in his despair he caught at this straw. After all, navigation by dead reckoning is not the most accurate way in the world of working one’s way along; and Captain Corbet felt this in an obscure and shadowy sort of way; so it need not be wondered at if he sought relief in the thought that he had possibly gone astray. So he called upon Wade to take the helm, while he went below to make some elaborate calculations. He did it in this way. He first got a mug of water. Then he seated himself by the cabin table. Then he dipped the fore finger of his right hand in the water. Then, with this finger, he traced certain mysterious marks upon the table.