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Awaiting word from John. Telegraph line needed. Wireless telegraphy. Sound and power. Vibrations. A universal force. B Street in Unity. Visiting the villagers in their homes. Incentives to beautify their houses. Erecting larger dwellings for the chiefs. The schoolhouse. A growing town. Marvels to the chiefs. The mysterious things the white men do. The thermometer. Teaching medicine. Cinchona. Calisaya. Acids. The boys reach the Illyas' village with the liberated prisoners. Making them comfortable. The white man a former companion of John. A health resort. The Investigator's lifeboat No. 3. Mystery about the note. The commotion outside. Capturing the Illyas' reinforcements from the south. Provisions. Cultivation of the soil. George and Harry explore the buildings. Trying to solve the puzzle. Arrangements of the streets.

Cornerstones. The treasure chart. Caves near the town. A guess at the meaning of the buildings. The Medicine men. Questioning the chief. He says John will be destroyed if he enters the cave. John's test of the truth of the chief's statement. The trip to the cave. Proving that the Medicine men lied. The chief enjoys his first ride. The cave entrance. John goes in. He finds the Krishnos. Their conversation. John appears before them. The consternation. Orders them to leave the cave. Shows the chief that the Medicine men have lied. Taking them to the village. John and the boys explore the cave alone. No treasure. An immense deposit of copper. Probable explanation of the houses of the town. An immense chamber. The start for Unity. Sighting the Saboro village. Muro's family. Waiting to go to Unity. The town out to meet the returning warriors. Angel at the reception.

Oroto surprised at the appearance of Marmo. Anxious to see the great White Chief. The Professor welcomes the Illyas' chief. His great surprise. Friendship. Has no further belief in the wise men. Life and death. Why he was brought to Unity. Peace among the tribes. Oroto and Marmo confer. A jollification of the whites. What had been accomplished in two years. Building a ship for home. Sadness as well as joy. The engineering force of Unity. How the different tribes lived together. Rich soil. New houses. New people. A printing press. A schoolhouse. Making paper. Many mysteries unsolved. One thing lacking. The flag. Getting the flagpole. The ceremony. Hoisting OLD GLORY.

LIST OF ILLUSTRATIONS

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