The Air TrustChapter IV · —AN INTERLOPERReading editionChapter navigation78 reading sectionsGo to chapterChoose a chapter…Front matterFOREWORDChapter I · —THE BIRTH OF AN IDEAChapter II · —THE PARTNERSChapter III · —THE BAITING OF HERZOGChapter IV · —AN INTERLOPERChapter V · —IN THE LABORATORYChapter VI · —OXYGEN, KING OF INTOXICATORSChapter VII · —A FREAK OF FATEChapter VIII · —ONE UNBIDDEN, SHARES GREAT SECRETSChapter IX · —DISCHARGEDChapter X · —A GLIMPSE OF THE PARASITESChapter XI · —THE END OF TWO GAMESChapter XII · —ON THE GREAT HIGHWAYChapter XIII · —CATASTROPHEChapter XIV · —THE RESCUEChapter XV · —AN HOUR AND A PARTINGChapter XVI · —TIGER WALDRON "COMES BACK"Chapter XVII · —THOUGHTSChapter XVIII · —FLINT AND WALDRON PLANChapter XIX · —CATHERINE'S DEFIANCEChapter XX · —THE BILLIONAIRE'S PLOTChapter XXI · —GABRIEL, GOOD SAMARITANChapter XXII · —THE TRAP IS SPRUNGChapter XXIII · —THE BEAST GLOATSChapter XXIV · —CATHERINE'S SUPREME DECISIONChapter XXV · —THROUGH STEEL BARSChapter XXVI · —"GUILTY"Chapter XXVII · —BACK IN THE SUNLIGHTChapter XXVIII · —IN THE REFUGEChapter XXIX · —"APRÈS NOUS LE DÉLUGE!"Chapter XXX · —TRAPPED!Chapter XXXI · —ESCAPE!Chapter XXXII · —OMINOUS DEVELOPMENTSChapter XXXIII · —"NOW COMES THE HOUR SUPREME"Chapter XXXIV · —THE ATTACKChapter XXXV · —TERROR AND RETREATChapter XXXVI · —THE STORMING OF THE WORKSChapter XXXVII · —DEATH IN THE PIT OF STEELChapter XXXVIII · —VISIONSChapter IChapter IIChapter IIIChapter IVChapter VChapter VIChapter VIIChapter VIIIChapter IXChapter XChapter XIChapter XIIChapter XIIIChapter XIVChapter XVChapter XVIChapter XVIIChapter XVIIIChapter XIXChapter XXChapter XXIChapter XXIIChapter XXIIIChapter XXIVChapter XXVChapter XXVIChapter XXVIIChapter XXVIIIChapter XXIXChapter XXXChapter XXXIChapter XXXIIChapter XXXIIIChapter XXXIVChapter XXXVChapter XXXVIChapter XXXVIIChapter XXXVIIIPrevious chapter ←Chapter III · —THE BAITING OF HERZOGNext chapter →Chapter V · —IN THE LABORATORYAll chapters and sections (78)Opening pagesFront matterOther sectionsFOREWORDChapters12345678910111213141516171819202122232425262728293031323334353637381234567891011121314151617181920212223242526272829303132333435363738CHAPTER IV.—AN INTERLOPER← CHAPTER III.—THE BAITING OF HERZOGCHAPTER V.—IN THE LABORATORY →