"Splendid!" he exclaimed. "You must spin your yarn later, after we've packed up and stowed away the gear. There's not much time. But, in any case, Minalto, you've won your place in the boat."

"Thank'ee, sir," replied Jasper gratefully.

Grey dawn was showing over the eastern height of the island when the four men returned to their huts. Burgoyne reported "all well" to Captain Blair, who, declining to hear details, told the Third Officer to turn in.

"You can't work watch and watch for two successive days unless you have a 'caulk'," he added. "It will be another hour and a quarter before the hands are turned out. Make the best of it."

But the Old Man was wrong in his estimate. No attempt was made to summon the crews of the three captured ships to their forced labour. They were piped to breakfast and then allowed to "stand easy", while armed pirates patrolled the inner circle of huts in addition to augmenting the guards in the two block-houses.

"Something's in the wind," declared Captain Blair. "The vessel that used her searchlight last night is evidently beating up for the island."

Soon there was no doubt on the point. From the compound the heights commanding the harbour and eastern approach to the island were plainly visible. Bodies of pirates were being rushed up to the concealed gun emplacements, which they could reach without being seen from seaward. Others were hurrying towards the tunnel, with the idea of manning the machine-guns that swept the entrance to the harbour and the only landing-place.

"The ball's about to commence," said Branscombe. "Wonder who'll open fire first?"

The prisoners listened in breathless suspense for the crash of the opening contest between the warship—or whatever she might be—and the quick-firers comprising the principal defences of the island. At intervals a powerful syren boomed out its raucous wail, demanding in Morse Code whether there were any people on the island.

Presently the sound came from the south'ard and then the west'ard, but no reply was sent from the pirates lying low on the apparently uninhabited island.