It was after three in the morning, and, though Whitaker had no means of knowing it, they were on the last and longest leg of the cruise. They still had moonlight, but it was more wan and ghastly and threatened presently to fail them altogether, blotted out by the thickening weather. The wind was blowing with an insistent, unintermittent force it had not before developed. A haze, vaguely opalescent, encircled the horizon like a ghost of absinthe. The cold, formless, wavering dusk of dawn in time lent it a sickly hue of gray together with a seeming more substantial. Swathed in its smothering folds, the moon faded to the semblance of a plaque of dull silver, then vanished altogether. By four-thirty, when the twilight was moderately bright, Whitaker was barely able to distinguish the leading boat. The two seemed as if suspended, struggling like impaled insects, the one in the midst, the other near the edge, of a watery pit walled in by vapours.
He recognized in this phenomenon of the weather an exceptionally striking variation of what his sea-going experience had taught him to term a smoky sou'wester.
That hour found him on the verge of the admission that he was, as he would have said, about all in: the limit of endurance nearly approached. He was half-dazed with fatigue; his wet skin crawled with goose-flesh; his flesh itself was cold as stone. In the pit of his stomach lurked an indefinite, sickening sensation of chilled emptiness. His throat was sore and parched, his limbs stiff and aching, his face crusted with stinging particles of salt, his eyes red, sore and smarting. If his ankle troubled him, he was not aware of it; it would need sharp agony to penetrate the aura of dull, interminable misery that benumbed his consciousness.
With all this, he tormented himself with worry lest the tanks run dry. Though they had been filled only the day before, he had no clear notion of the horse-power of the motor or its hourly consumption of gasoline; and the drain upon the supply could not have been anything but extraordinary. If it were to run out before they made a landing or safe anchorage, he would find himself in ticklish straits; but this troubled him less than the fear that he might be obliged to give up the chase to which he had stuck so long and with a pertinacity which somewhat surprised even his own wonder.