Cannon

That before living agent, now became the living instrument. If such a furious trope may stand, his special lunacy stormed his general sanity, and carried it, and turned all its concentred cannon upon its own mad mark; so that far from having lost his strength, Ahab, to that one end, did now possess a thousand fold more potency than ever he had sanely brought to bear upon any one reasonable object.

This is much; yet Ahab’s larger, darker, deeper part remains unhinted.

After taking counsel with his officers, he anchored the ship as far off shore as possible; loaded and ran out his two cannon from the bows; stacked his muskets on the poop; and warning the Islanders not to approach the ship at their peril, took one man with him, and setting the sail of his best whale-boat, steered straight before the wind for Tahiti, five hundred miles distant, to procure a reinforcement to his crew.

“On the fourth day of the sail, a large canoe was descried, which seemed to have touched at a low isle of corals. He steered away from it; but the savage craft bore down on him; and soon the voice of Steelkilt hailed him to heave to, or he would run him under water.