“And yet,” added the sailor, “a flag is floating from her peak, but I cannot distinguish the colours of it.”

“In half an hour we shall be certain about that,” answered the reporter. “Besides, it is very evident that the intention of the captain of this ship is to land, and, consequently, if not to-day, to-morrow at the latest, we shall make his acquaintance.”

“Never mind!” said Pencroft. “It is best to know whom we have to deal with, and I shall not be sorry to recognise that fellow’s colours!”

And, while thus speaking, the sailor never left the glass. The day began to fade, and with the day the breeze fell also. The brig’s ensign hung in folds, and it became more and more difficult to observe it.

“It is not the American flag,” said Pencroft from time to time, “nor the English, the red of which could be easily seen, nor the French or German colours, nor the white flag of Russia, nor the yellow of Spain. One would say it was all one colour. Let’s see: in these seas, what do we generally meet with? The Chilian flag?—but that is tri-colour. Brazilian?—it is green. Japanese?—it is yellow and black, whilst this—”

At that moment the breeze blew out the unknown flag. Ayrton, seizing the telescope which the sailor had put down, put it to his eye, and in a hoarse voice—

“The black flag!” he exclaimed.

And indeed the sombre bunting was floating from the mast of the brig, and they had now good reason for considering her to be a suspicious vessel!

Had the engineer, then, been right in his presentiments? Was this a pirate vessel? Did she scour the Pacific, competing with the Malay proas which still infest it? For what had she come to look at the shores of Lincoln Island? Was it to them an unknown island, ready to become a magazine for stolen cargoes? Had she come to find on the coast a sheltered port for the winter months? Was the settler’s honest domain destined to be transformed into an infamous refuge—the headquarters of the piracy of the Pacific?