CONTENTS

CHAPTERPAGE
I. THE END OF THE UNDERGROUND RIVER[ 1]
II. SKY HIGH[ 11]
III. THE RETURN TO THE LAND OF THE INCAS[ 24]
IV. THE RIVALRY OF THE AIRMEN[ 32]
V. IN QUEST OF THE HIDDEN TREASURE[ 43]
VI. THE CROWNING MISFORTUNE[ 55]
VII. IN THE TIGER’S LAIR[ 66]
VIII. THE INCA’S THREAT[ 80]
IX. SONCCO’S SHREWDNESS[ 92]
X. THE PRISONERS CAPTURE THE KING[ 105]
XI. THE COUNSEL OF THE WISE MEN[ 116]
XII. THE VILLAINY OF VILLAC UMU[ 128]
XIII. STANLEY’S PLAN[ 140]
XIV. SONCCO’S AID TO THE PLOTTERS[ 151]
XV. THE TERROR OF DARKNESS AT MIDDAY[ 165]
XVI. THE COMING OF THE TIGERS[ 180]
XVII. ANIMALS OF A BYGONE AGE[ 193]
XVIII. THE MAN IN THE CRATER[ 205]
XIX. THE BREACH IN THE MOUNTAIN IS CLOSED [ 221]
XX. THE KING IS CROWNED[ 233]