"Depend upon it, then, you have been deceived," said Adair, "as I should, had I not the fortunate chance, by means of Pango, to discover the trick the rascally Arabs are playing us. All those black passengers were really slaves, dressed up by their masters. However, we'll take care in future that their trick doesn't avail them, and they must take to some other dodge if they wish to escape us." Jos Green, he found, had gone over towards the mainland, to watch for any vessels running in or out of Angoxa, or slipping by up the coast, and as he had been away for several days, it was expected that he would soon be back. Several times before going on shore Adair swept the horizon with his glass in search of the missing dhow, expecting every instant to see her sail, like the dark fin of a shark, rising above the waters. He looked, however, in vain. The other officers climbed, one after the other, to the look-out place, but came back with the report that no sail was in sight. He at once, therefore, made up his mind to send the pinnace, with a fresh crew, in search of the dhow. The wind, though contrary, was slight, and she might reach the spot where the dhow had last been seen before nightfall, and, if any accident had happened to her, render assistance. His only dread was that she might have been leaky, as he knew to be the case with many such craft, and perhaps have gone down. He and his men were pretty well worn--out from want of sleep and hard work. Having seen the slaves landed, and fresh hands placed in charge of the dhow and the Arab crew, he therefore lay down in his tent to obtain the rest he so much required. Completely exhausted, he slept on till morning. His first inquiry on awaking was for the pinnace. She had not returned, nor had Green made his appearance. He naturally became more anxious than ever; something serious, he feared, must have happened to the midshipmen, or they would not have failed to have reached the island by that time. He was on the point of despatching another boat, when the look-out man from the signal-station reported that a dhow was in sight coming across from the mainland. Her arrival was eagerly looked for. There could be no doubt that she was a prize made by Green. This was ascertained positively to be the case, and in about an hour she came to an anchor off the island, having Green's boat astern. The two remaining boats at once put off, Adair going in one of them, accompanied by Pango (Bango had gone with Green to act as his interpreter). "Why," exclaimed Adair, as he drew near the dhow, "she's the very vessel we captured! and has, I hope, the midshipmen and the rest of the boat's crew on board." Green hailed them from the deck as they approached. "Glad of your assistance," he said, "for I've got a pretty shipload of scoundrels, who gave us a tough job to take them."