The morning came, and soon after breakfast, as the boat was running along the coast, the entrance to a river, apparently of some size, was discovered. The sea was tolerably calm on the bar, and as it appeared a likely place for slavers to ship their cargoes, Adair resolved to run in and explore it thoroughly. The wind carried them close up to the mouth, when, it failing altogether, the oars were got out, and the crew pulled away lustily, in the hopes of at length finding a slaver which they could make their lawful prize. At this time, however, the Sultan of Zanzibar issued licences to no inconsiderable number of vessels, on the pretence that they were engaged in bringing him negroes to work on his plantations; although, were his island ten times the size that it really is, he could not have employed one-tenth of the blacks carried off to slavery. On this flimsy pretext they might therefore find a dhow full of blacks, and yet not be able to capture her. This, of course, was often the cause of great disappointment to the crews engaged in the suppression of the slave-trade.

A belt of mangrove trees running far into the water being passed, a long reach of the river was opened up, with a large dhow at the farther end of it, lying at anchor in mid-stream, apparently ready to sail. The crew of the pinnace could not restrain a shout of satisfaction. In spite of the hot sun beating down on their heads, they eagerly bent to their oars in the hopes of soon being on board her. As they approached, they saw that her sails were unbent, so that she could not have been on the point of putting to sea. On getting still nearer, about twenty fierce-looking Arabs popped their heads over the side, and in loud voices, with threatening gestures, ordered the boat to keep off, intimating that if she did not, they would fire into her. That she possessed the power of doing mischief was evident, as a three-pounder gun was seen mounted on a sort of raised deck in her bow.

Neither Adair nor his crew were likely to be deterred by the menaces of the piratical-looking fellows from boarding the dhow. With a loud cheer they dashed alongside, and quickly scrambled on her deck, cutting down several of the more daring of the band, who, not knowing what English seamen were made of, ventured to oppose them. A fine-looking old fellow, with a long white beard, who proved to be the Arab captain, exchanged a few passes with Adair, who, however, quickly disarmed him, and tumbled him head over heels into the hold, while the rest of his men leaped below to escape from their daring assailants. On following them, Adair found, to his disappointment, that there were no slaves on board. The Arab crew having been secured, Adair ordered his men to bend the sail, while he and Desmond, accompanied by Jerry Bird, searched the vessel to ascertain whether she had anything on board by which she could be legally condemned. Besides the three-pounder gun, a number of muskets, spears, and swords were found on board, with a supply of water and a large quantity of rice, in addition to which her hold was fitted with three tiers of bamboo decks, which could be intended for no other purpose than for the stowage of slaves.

Adair pointed this out to the old skipper, and made him understand that he considered the vessel his lawful prize.

“It is the will of Allah,” answered the captain, who made no attempt to show either papers or colours, so it was considered evident that he did not possess them.

“There are whole hosts of people collecting on shore, sir,” shouted Archie; “many of them are armed, and by the signs they are making they don’t seem in a friendly mood. They’ve got, too, plenty of canoes, and it looks very much as if they intended to come off and attack us.”

Adair hurried on deck, and could not help being of Archie’s opinion. “Be sharp there with the sail,” he cried.

“It’s more than we can manage to bend it, sir,” answered Jerry Bird; “for there’s not a bit of rope-yarn or stuff of any kind we can find to do instead.”

Adair and Desmond, stepping forward to lend a hand, found that the men were right. The blacks on shore, increasing in numbers, were already uttering most terrific shouts and cries, and had begun to launch their canoes. It would be impossible to defend the dhow without running the risk of losing the boat. Adair had no wish to bring on an encounter with the savages.

“We must burn the craft and make the best of our way out of the river,” he exclaimed. “Get the prisoners into the boat, and we will then set the dhow on fire, and prevent her, at all events, from taking on board another cargo of ebony.”