"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. "The one who knows about the treasure, I mean. We haven't seen him since we left the ship last night, and he may be anxious to know what plans we have in mind." "Yes," agreed Joe. "And while there we can warn him against these crooks. They may come on to him for the map, since they found that we haven't it." First, however, the boys' fathers and Dr. Kirshner wished to breakfast. "And while they're busy eating, suppose we go out," suggested Joe. "We don't need to stay but a few minutes." Bob agreed. He, like his friend, was anxious to observe the strangeness of this unusual city. If what he had heard was true, it would be something to be long remembered. Out on the street the youths were at once impressed by the wide variety of races and costumes. Frenchmen, Italians, Spaniards, Mahonese, and Maltese all walked side by side, the majority in European garb. Arabs, or rather those who are commonly called Arabs, for they are a very mixed breed, sauntered along, clad in their long gowns and _hlafa_, which hung down over the face and sides of the head. Occasionally a Negro could be seen, although this was the exception rather than the rule. "Sure have variety here," smiled Joe. "There's about every race imaginable present." In a short time the youths reached the Place du Gouvernement, or central square, and the busy scene of life was very interesting. On one side of the forum was the Mosque of Djema-el-Djedid and the Grand Mosquée, and on the others were stores, hotels, and cafés. Stretching away in the distance were the four great streets of the city. Bob and Joe spent some time in one position, watching the throng of Arabs, soldiers, Jews, and others peculiar to this metropolis. Strange, the boys thought, that the people paid little or no attention to them. But this was probably due to the fact that hundreds of tourists visit the city each year. "I'd like to visit some of the stores," remarked Bob. "But we'd better get back to the hotel." "Yes. Our dads and Dr. Kirshner will probably be waiting for us."