“D’you notice any movement when I fire a gun, sir?” As he asked the question he turned and waved to the captain of a midship gun which was loaded and run out. The gun captain brought the linstock down on the touchhole, and the gun roared out and came recoiling back through the smoke. Bush’s foot on the cable recorded the effect.

“Only the jar—no—yes.” Inspiration came to Bush. To the question he asked, Bush already knew the answer Hornblower would give. “What are you thinking of?”

“I could fire all my guns at once. That might break the suction, sir.”

So it might, indeed. The Renown was lying on mud, which was clutching her in a firm grip. If she could be severely shaken while the hawser was maintained at full tension the grip might be broken.

“I think it’s worth trying, by God,” said Bush.

“Very good, sir. I’ll have my guns loaded and ready in three minutes, sir.” Hornblower turned to his battery and funnelled his hands round his mouth. “Cease fire! Cease fire, all!”

“I’ll tell ‘em at the capstan,” said Bush.

“Very good, sir.” Hornblower went on giving his orders. “Load and doubleshot your guns. Prime and run out.”

That was the last that Bush heard for the moment as he went up on the maindeck and made his suggestion to Smith, who nodded in instant agreement.

“’Vast heaving!” shouted Smith, and the sweating men at the bars eased their weary backs.