After examining the nearest islands, and deciding upon a spot whereon to build a station, the two white men returned to the boats, which pulled out towards the centre of the lagoon. Half a mile due west from the centre of the south-east islet the deep blue water began to lighten in colour, till it became a pale green, and the coral bottom lay dearly revealed at a depth of five fathoms.

"This is one of the patches mentioned by Gurden," said Barry, after carefully taking bearings, and studying a rough plan of the lagoon which had been given him by Rawlings; "let us try here first. Billy Onotoa, and you, Tom Arorai, go down and see."

Billy and a countryman—a short square-built native of the Line Islands—let go their oars, picked up their diving sticks, and were over the side in an instant; but even before they were half-way down the other natives in the boat, who were intently scanning the bottom, cried out that they could see "plenty pearl shell." The truth of their assertions was soon proved by the two divers returning to the surface, each carrying two pairs of splendid shells as large as dinner plates.

Rawlings' dark eyes sparkled. "What do you think of that, Mr. Barry?"

"If the rest of the patches in the lagoon have shell like that, there is a huge fortune in it—shell such as that is worth 250 pounds a ton. A fortune indeed—even if not a single pearl was found."

Rawlings breathed excitedly. "But there are plenty, plenty. We can be certain of that. Let us get back to the ship as quickly as possible, and get ready to start work," and seizing the steer oar, he bade the men give way, not with an encouraging word, but a savage oath.

Barry looked at him in astonishment and disgust combined. The man's usual smiling, self-complacent manner had disappeared, and he now seemed a prey to emotion, his face alternately paling and flushing with excitement, and Barry saw that his whole frame was trembling. By the time the boats came alongside the brig, however, he was restored to his usual self.

Barradas, Warner, and Paul, the truculent-looking Greek boatswain, were on the main-deck as Rawlings ascended.

"Well?" said Barradas inquiringly.

"It's all right," answered Rawlings in a low voice, as if he feared to speak aloud; "we shall be well repaid for all——"