For a long distance the hostile tribes were found to speak practically the same language, and Dr. Wolf's interpreter was the most important person on the boat. The natives thought the strangers could not understand them, and so they freely talked of their plans for attacking them. One day, when Dr. Wolf stopped to repair the _En Avant_, natives armed with bows and arrows speedily surrounded the steamer. They were not a bit afraid, and drew right up alongside. Their chief, Tongolata, told his warriors that these strangers were entirely at his mercy. Why, he couldn't see a single weapon among them! He looked at a gun with great curiosity. "Whatever the thing is," he finally declared, "it is not a weapon." He told his people it would be easy enough to kill these folks and seize all the strange and beautiful things they were showing. Things were beginning to look squally. More canoes were coming every minute. Dr. Wolf was a man of peace, and would not take a human life unless it was necessary to save his own men. But he must do something to over-awe these savages. He showed the chief a revolver, and told him it carried lightning that killed men. Then he held the weapon so that its discharge would hurt no one, but the barrel was close to the King's ear. He pulled the trigger, and the chief fell to the bottom of his boat, stunned by the terrible noise. All the natives were stupefied with astonishment and fear. The chief held on to both his ears until he decided that he was not hurt, and then he declared that he was the white man's good brother, and honored his new friend with a present of two chickens. Some explorers--very few, it is hoped--would have fired into the crowd under such circumstances. But men who are fit to be trusted among barbarous peoples have very often been able to insure safety when danger threatened by some such expedient as that which Dr. Wolf adopted. The actions of some of these tribes when they first caught sight of the wonderful "fire-canoe" were very curious. The Bena-Jehka, for instance, threw themselves on the ground--not in fear, however, for they greeted the coming vessel with a hearty clapping of hands. The friendly natives were greatly tickled to find that this puffing boat was no match in a race with their canoes. They could travel all around her; and no wonder, for some of their dugouts were nearly ninety feet long--twice the length of the _En Avant_--and eighty paddlers standing erect in the larger boats made them fairly skim through the water. Sometimes fifty of these canoes were darting here and there, playing tag with the slow steamer, and dodging her every time. It was great sport for the friendly natives of the south bank, and the hostiles across the river did not know how much fun they were missing. None of these people had ever heard of a gun.