“There, what's that?” exclaimed Wilbur under his breath. A gentle vibration, barely perceptible, thrilled through the schooner. Under his hand, that was clasped upon the rail, Wilbur could feel a faint trembling in her frame. It stopped, began again, and died slowly away.
“Well, what the devil IS it?” he muttered impatiently, trying to master the returning creep of dread.
Moran shook her head, biting her lip.
“It's beyond me,” she said, frowning. “Can you see anything?” The sky, sea, and land were unbroken reaches of solitude. There was no breath of wind.
“Listen,” said Moran. Far off to landward came the faint, sleepy clucking of a quail, and the stridulating of unnumbered crickets; a long ripple licked the slope of the beach and slid back into the ocean. Wilbur shook his head.
“Don't hear anything,” he whispered. “Sh—there—she's trembling again.”
Once more a prolonged but faint quivering ran through the “Bertha Millner” from stem to stern, and from keel to masthead. There was a barely audible creaking of joints and panels. The oil in the deck-tubs trembled. The vibration was so fine and rapid that it tickled the soles of Wilbur's feet as he stood on the deck.
“I'd give two fingers to know what it all means,” murmured Moran in a low voice. “I've been to sea for—” Then suddenly she cried aloud: “Steady all, she's lifting again!”
The schooner heaved slowly under them, this time by the stern. Up she went, up and up, while Wilbur gripped at a stay to keep his place, and tried to choke down his heart, that seemed to beat against his palate.
“God!” ejaculated Moran, her eyes blazing. “This thing is—” The “Bertha” came suddenly down to an easy keel, rocking in that glassy sea as if in a tide rip. The deck was awash with oil. Far out in the bay the ripples widening from the schooner blurred the reflections of the stars. The Chinamen swarmed up the hatch-way, voluble and shrill. Again the “Bertha Millner” lifted and sank, the tubs sliding on the deck, the masts quivering like reeds, the timbers groaning aloud with the strain. In the stern something cracked and smashed. Then the trouble died away, the ripples faded into the ocean, and the schooner settled to her keel, quite motionless.