The national affairs of His Highness had called him home, but he had apparently placed his steam-yacht in command of a Captain Mazagan; and this ruffian, attended by Ulbach, the detective, had followed the party to Egypt. The capture of Louis Belgrave, or the young lady, or both of them, was the object of the ruffian, who was to receive two hundred thousand francs if he succeeded, or half that sum if he failed. Louis had had a narrow escape from these ruffians in Cairo; but he had worked his way out of the difficulty, assisted by a chance incident.

The Fatimé had been discovered in the harbor of Alexandria before the Guardian-Mother and her tender sailed. The peril which menaced the young lady had been kept a profound secret from all except three of the "Big Four;" for the commander believed himself abundantly able to protect his passengers, and the knowledge of the danger would have made the ladies so nervous and terrified that Mrs. Belgrave and the Woolridges would have insisted upon returning to New York, and abandoning the voyage from which so much of pleasure and instruction was expected.

Captain Ringgold and Louis had considered the situation, and fully realized the intention of Captain Mazagan to follow the steamer and her little consort. They had agreed upon a plan, after Captain Scott and Felix, who was the detective of the ship, by which they hoped to "fool" the enemy, as the young commander expressed it. The Fatimé had sailed early in the morning, but she was soon discovered off the Bay of Abukir. The reader is now in condition to inquire into what Captain Scott regarded as the one great mistake that had been made in the arrangements for outwitting the Moorish steam-yacht.

The young captain was in the pilot-house of the Maud when the steamer was discovered. He was the commander; but the smallness of the ship's company made it necessary for him to keep his own watch, which is usually done by the second mate for him. Morris Woolridge, who had had considerable experience in his father's yacht, was the first officer, and there was no other. The young millionaire, in spite of his influence as owner, had insisted on serving as a common sailor, or deck-hand, with Felix. There were two engineers and a cook, who will be presented when they are needed.

"What is the one great mistake, Captain Scott?" asked Louis, who stood at the open window in front of the pilot-house.

"The single mistake of any consequence is in the fact that you are on board of the Maud when you ought to be stowed away in the cabin of the Guardian-Mother," replied the captain very decidedly, with something bordering on disgust in his tones and manner. "Instead of keeping you out of danger, you are running just as straight into the lion's den as you can go, Louis."

"Where is the lion's den, please to inform me," replied the young millionaire, scouting, in his tones and manner, any idea of peril to himself which was not shared by his companions.

"On board of that four-hundred-ton steamer which you see off by the coast."

"Do you think I ought to be any more afraid of her than the rest of the fellows?" demanded Louis. "Do you wish me to stand back and stay behind a fence while you face the enemy?"

"Of course I don't believe you are afraid, Louis, my dear fellow," added Captain Scott, perhaps fearing he had said too much, or had been misunderstood.