Captured by the Arabs. Foster James H.

go over there in the morning. He had already made reservations at this hostelry or would have put up with us.”

      The remainder of that evening was spent quietly, for the explorers were tired after the long journey on the Sylvania.

      Bob and Joe were up early the next morning, and after a small but satisfying breakfast they started out for a short walk. But they had scarcely covered a square when Joe, who had happened to glance back, stopped suddenly and nudged his friend.

      Bob looked, and an answering expression of surprise and anger came on his face.

      Walking slowly into the hotel were the two Arabs who had acted so suspiciously on the ship.

      CHAPTER II

      Scoundrels at Work

      “WHAT do you suppose they want?” asked Joe, as the youths followed the movements of the Arabs.

      “They’re not there for any good,” returned Bob, a look of anger, and at the same time anxiety, on his face. “Probably want to find that map that tells of the hidden treasure. Oh, of course it could be a coincidence that they picked the same hotel that we did, but it isn’t likely.”

      The boys watched the suspicious characters until they disappeared into the hotel. Then Joe suggested that they cautiously follow.

      “All right,” Bob agreed. “But we must be careful and not get too close. They might have guns and think nothing of using them, and they could probably get away in this country.”

      Slowly the youths moved up to the entrance and peeped around the corner. Satisfied that there was no one in sight, they went inside.

      “Nobody here but our dads and Dr. Kirshner,” observed Bob, glancing about. “I wonder if they noticed the Arabs?”

      “Let’s ask them.”

      The men had noticed the fellows, they said, but thought nothing about it. Why? Was anything wrong?

      Bob explained that they were the two who had acted in a suspicious manner on the ship, and at once the scientists’ faces lightened.

      “Come on,” urged Dr. Kirshner. “We can’t get there any too rapidly. When they find that we haven’t got the map, they’ll probably help themselves to money and anything else that happens to be lying about. They may even search other rooms.”

      Hastily, and yet quietly, the boys and their elders went up the stairway. They were unarmed, their revolvers and other firearms having been left in their rooms. This might prove a handicap if the Arabs possessed weapons, but the Americans thought nothing of the risk they were taking.

      “We’re five to two, even if we haven’t our guns,” said Bob, clinching his fists. “They’re likely to be shaken by numbers.”

      But Dr. Kirshner, who knew the ways of these cunning natives, smiled grimly.

      In a short time they reached the floor on which were their rooms and turned cautiously down the hall. With utmost care lest they be discovered, the explorers tiptoed up to their rooms.

      Mr. Holton took the lead and glanced around the door into the room. A moment later his face scowled.

      “What is it?” demanded Joe, in a whisper. “Are they inside?”

      Mr. Holton shook his head.

      “Worse than that,” he said solemnly. “Take a look.”

      While the others are taking in the situation, it might be well to tell something about Bob Holton and Joe Lewis and, incidentally, their fathers.

      Bob was a big, well-built youth of some eighteen years. He was particularly fond of adventure and life in the open, and always welcomed an opportunity that might bring about a realization of his desire.

      Joe, who was about the same age, was of medium size and strength, with a naturally dark complexion that was now still further darkened by the tropical sun. He, like his friend, was fond of adventure, hunting and fishing and hiking whenever the opportunity presented itself.

      The youths were together much of their time and agreed on practically every point. Their home was in Washington, D. C., where their fathers, Mr. Holton and Mr. Lewis, were employed as naturalists by a large museum.

      A short time before, the youths were successful in persuading their fathers to take them on an expedition to unexplored Brazil. Here they helped the naturalists shoot and classify wild animals, birds, and reptiles and had many thrilling adventures with wild animals and savage Indians. How they fought hand-to-hand with a huge jaguar, barely prevented themselves from being crushed by a terrible anaconda, battled against rapids, and finally became lost and wandered for days in the world’s greatest jungle are told in the first volume of this series, entitled, Lost in the Wilds of Brazil.

      The boys spent the following winter finishing up in high school, and scarcely was graduation over when their fathers were requested by the museum to make an expedition to the Sahara Desert to collect specimens of any animal life that might be present in the remote interior. Dr. Kirshner, of whom something has been said, wished to accompany the naturalists to investigate the remains of ancient civilizations. At once Bob and Joe requested that they be taken also, and after careful consideration their elders at last consented. What the boys were particularly looking forward to was taking motion pictures of the desert, for they had been engaged by the Neuman Film Corporation to get many unusual scenes.

      Less than a week later the expedition sailed on the steamer Sylvania and made the long voyage without any special incident.

      Now let us return to the boys, as they advanced into their elders’ room.

      At once their mood changed, an expression of astonishment, later turning to anger, creeping over their faces.

      Everything in the room was in the wildest disorder. Clothes, shoes, satchels, rifles, papers lay scattered about, the scene suggesting that a cyclone had visited the place. It was most deplorable, and the travelers stood for some time as if trying to catch the true meaning of it all.

      Finally their anxiety caused them to move forward and inspect the belongings.

      “Good thing we didn’t have the treasure map,” remarked Mr. Lewis, examining the contents of a small black bag. “It wouldn’t be here now.”

      At the end of their inspection the explorers found that nothing had been taken from their belongings. It appeared that the crafty Arabs wished only the treasure map, and that, not being able to find it, they had left without any other spoils.

      “They sure acted in wild haste,” observed Mr. Holton. “It’s almost impossible to see how all this could have been torn up so quickly. It wasn’t five minutes from the time that you boys told of seeing the men that we were up here.”

      “Trust the Arabs to do that,” said Dr. Kirshner, with a dry smile.

      The scientists’ possessions were placed back in their proper places, and then they went to inspect the room occupied by Bob and Joe.

      “Probably nothing taken from here, either,” was the opinion expressed by Mr. Holton, and he proved right, as they later found.

      “This shows that these Arabs are desperate characters, and will probably stop at nothing,” said Dr. Kirshner, after a moment of thought. “We must be extremely careful to lock everything up from now on. It may even mean that we’ll have to watch ourselves, too.”

      “What do you mean?” asked Joe.

      “Simply that they may try to kidnap one or all of us to get possession of the map,” he replied in a low voice. “I know these natives. I’ve seen some of their actions before and feel sure that if these two men thought there was a good chance to get the map, they would try to do it.”

      “It may not be as easy as they think,” said Bob, although he was a bit uneasy.

      No more time was spent in the rooms, for they were all desirous of seeing more of the strange city and country.

      “It might be wise to call on our Arabian friend first,” said Dr. Kirshner.