The whole of the blacks were secured, as were the surviving Arabs, and marched back to be carried on board the ship. Jack, meantime, had been very anxious about the party who had to proceed overland; and he determined to send some men, well armed, with provisions and water, to meet them. Tom and Gerald begged leave to go, in company with the doctor, who carried restoratives and medicines. The day was far advanced when they landed. They at once struck off to the north, keeping a bright look-out for the Arabs on one side and their friends on the other. It was near evening when they saw some figures wending their way over a rocky hill to the northward. They were at first doubtful whether or not they were Arabs; if such was the case, they were fully prepared for them. "No, they are our fellows!" exclaimed Tom. Just as he spoke, another much larger party were seen on the left, making their way towards the first. Tom's glass was at his eye in a moment. "Those are Arabs; no doubt about it," he said. "They have muskets, too, and it's very evident that they are intending to cut off our friends. We shall disappoint them, though, I hope." The officer in command of the party, having ascertained that Tom was right, gave the order to push forward as rapidly as possible. The Arabs had apparently not yet discovered them, and were still advancing, with their gaze fixed only on those whom they hoped to make their prey. Besides the Arabs, there were numerous blacks, secured together, in the ordinary barbarous fashion, with forked sticks. There could be little doubt that they were slaves who had escaped from the wrecked dhow, and were being taken back to the coast, to be embarked on board another slaver. The seamen, descending into the valley, soon lost sight of both parties. In spite of the burning sun, which made the air in the valley like that of a hothouse, they pushed rapidly on. Presently they heard some shots fired, which seemed to come from the heights above them. Those heights must be scaled before they could reach their friends. The firing became more and more rapid as they climbed up; they at last caught sight of Archie and his party, who, posted on some rocks, were defending themselves against overwhelming numbers of Arabs. Tom and Gerald uttered a loud cheer, which was taken up by the men, and then, without waiting an instant to gain breath, first firing a volley, they rushed with their cutlasses at the Arabs, who, turning and throwing down their arms, scampered off with the activity of cats, leaving five or six of their number dead or wounded behind them.