before　me　was　open。
  At　last　the　truth　dawned　upon　meI　was　following　a　subterranean
  river　which　emptied　into　the　Iss　at　the　very　point　where　I　had　hidden。
  The　rowers　were　now　quite　close　to　me。　　The　noise　of　their　own
  paddles　drowned　the　sound　of　mine；　but　in　another　instant　the
  growing　light　ahead　would　reveal　me　to　them。
  There　was　no　time　to　be　lost。　　Whatever　action　I　was　to　take　must
  be　taken　at　once。　　Swinging　the　prow　of　my　boat　toward　the　right；
  I　sought　the　river's　rocky　side；　and　there　I　lay　while　Matai　Shang
  and　Thurid　approached　up　the　center　of　the　stream；　which　was　much
  narrower　than　the　Iss。
  As　they　came　nearer　I　heard　the　voices　of　Thurid　and　the
  Father　of　Therns　raised　in　argument。
  〃I　tell　you；　Thern；〃　the　black　dator　was　saying；　〃that　I　wish
  only　vengeance　upon　John　Carter；　Prince　of　Helium。　　I　am　leading
  you　into　no　trap。　　What　could　I　gain　by　betraying　you　to　those　who
  have　ruined　my　nation　and　my　house？〃
  〃Let　us　stop　here　a　moment　that　I　may　hear　your　plans；〃
  replied　the　hekkador；　〃and　then　we　may　proceed　with　a　better
  understanding　of　our　duties　and　obligations。〃
  To　the　rowers　he　issued　the　command　that　brought　their　boat　in
  toward　the　bank　not　a　dozen　paces　beyond　the　spot　where　I　lay。
  Had　they　pulled　in　below　me　they　must　surely　have　seen　me
  against　the　faint　glow　of　light　ahead；　but　from　where　they　finally
  came　to　rest　I　was　as　secure　from　detection　as　though　miles
  separated　us。
  The　few　words　I　had　already　overheard　whetted　my　curiosity；
  and　I　was　anxious　to　learn　what　manner　of　vengeance　Thurid　was
  planning　against　me。　　Nor　had　I　long　to　wait。　　I　listened　intently。
  〃There　are　no　obligations；　Father　of　Therns；〃　continued　the
  First　Born。　　〃Thurid；　Dator　of　Issus；　has　no　price。　　When　the　thing
  has　been　accomplished　I　shall　be　glad　if　you　will　see　to　it　that　I
  am　well　received；　as　is　befitting　my　ancient　lineage　and　noble
  rank；　at　some　court　that　is　yet　loyal　to　thy　ancient　faith；　for　I
  cannot　return　to　the　Valley　Dor　or　elsewhere　within　the　power　of
  the　Prince　of　Helium；　but　even　that　I　do　not　demandit　shall　be　as
  your　own　desire　in　the　matter　directs。〃
  〃It　shall　be　as　you　wish；　Dator；〃　replied　Matai　Shang；　〃nor　is
  that　allpower　and　riches　shall　be　yours　if　you　restore　my
  daughter；　Phaidor；　to　me；　and　place　within　my　power　Dejah　Thoris；
  Princess　of　Helium。
  〃Ah；〃　he　continued　with　a　malicious　snarl；　〃but　the　Earth　man
  shall　suffer　for　the　indignities　he　has　put　upon　the　holy　of
  holies；　nor　shall　any　vileness　be　too　vile　to　inflict　upon　his
  princess。　　Would　that　it　were　in　my　power　to　force　him　to　witness
  the　humiliation　and　degradation　of　the　red　woman。〃
  〃You　shall　have　your　way　with　her　before　another　day　has
  passed；　Matai　Shang；〃　said　Thurid；　〃if　you　but　say　the　word。〃
  〃I　have　heard　of　the　Temple　of　the　Sun；　Dator；〃　replied　Matai　Shang；
  〃but　never　have　I　heard　that　its　prisoners　could　be　released
  before　the　allotted　year　of　their　incarceration　had　elapsed。
  How；　then；　may　you　accomplish　the　impossible？〃
  〃Access　may　be　had　to　any　cell　of　the　temple　at　any　time；〃
  replied　Thurid。　　〃Only　Issus　knew　this；　nor　was　it　ever　Issus'　way
  to　divulge　more　of　her　secrets　than　were　necessary。　　By　chance；
  after　her　death；　I　came　upon　an　ancient　plan　of　the　temple；
  and　there　I　found；　plainly　writ；　the　most　minute　directions
  for　reaching　the　cells　at　any　time。
  〃And　more　I　learnedthat　many　men　had　gone　thither　for　Issus　in
  the　past；　always　on　errands　of　death　and　torture　to　the　prisoners；
  but　those　who　thus　learned　the　secret　way　were　wont　to　die
  mysteriously　immediately　they　had　returned　and　made　their
  reports　to　cruel　Issus。〃
  〃Let　us　proceed；　then；〃　said　Matai　Shang　at　last。　　〃I　must
  trust　you；　yet　at　the　same　time　you　must　trust　me；　for　we
  are　six　to　your　one。〃
  〃I　do　not　fear；〃　replied　Thurid；　〃nor　need　you。　　Our　hatred　of
  the　common　enemy　is　sufficient　bond　to　insure　our　loyalty　to　each
  other；　and　after　we　have　defiled　the　Princess　of　Helium　there　will
  be　still　greater　reason　for　the　maintenance　of　our　allegiance
  unless　I　greatly　mistake　the　temper　of　her　lord。〃
  Matai　Shang　spoke　to　the　paddlers。　　The　boat　moved　on　up　the　tributary。
  It　was　with　difficulty　that　I　restrained　myself　from　rushing　upon
  them　and　slaying　the　two　vile　plotters；　but　quickly　I　saw　the　mad
  rashness　of　such　an　act；　which　would　cut　down　the　only　man　who
  could　lead　the　way　to　Dejah　Thoris'　prison　before　the　long
  Martian　year　had　swung　its　interminable　circle。
  If　he　should　lead　Matai　Shang　to　that　hollowed　spot；　then；
  too；　should　he　lead　John　Carter；　Prince　of　Helium。
  With　silent　paddle　I　swung　slowly　into　the　wake　of　the　larger　craft。
  UNDER　THE　MOUNTAINS
  As　we　advanced　up　the　river　which　winds　beneath　the　Golden
  Cliffs　out　of　the　bowels　of　the　Mountains　of　Otz　to　mingle　its　dark
  waters　with　the　grim　and　mysterious　Iss　the　faint　glow　which　had
  appeared　before　us　grew　gradually　into　an　all…enveloping　radiance。
  The　river　widened　until　it　presented　the　aspect　of　a　large
  lake　whose　vaulted　dome；　lighted　by　glowing　phosphorescent　rock；
  was　splashed　with　the　vivid　rays　of　the　diamond；　the　sapphire；
  the　ruby；　and　the　countless；　nameless　jewels　of　Barsoom　which　lay
  incrusted　in　the　virgin　gold　which　forms　the　major　portion　of　these
  magnificent　cliffs。
  Beyond　the　lighted　chamber　of　the　lake　was　darknesswhat　lay
  behind　the　darkness　I　could　not　even　guess。
  To　have　followed　the　thern　boat　across　the　gleaming　water
  would　have　been　to　invite　instant　detection；　and　so；　though　I　was
  loath　to　permit　Thurid　to　pass　even　for　an　instant　beyond　my　sight；
  I　was　forced　to　wait　in　the　shadows　until　the　other　boat　had　passed
  from　my　sight　at　the　far　extremity　of　the　lake。
  Then　I　paddled　out　upon　the　brilliant　surface　in　the　direction
  they　had　taken。
  When；　after　what　seemed　an　eternity；　I　reached　the　shadows　at
  the　upper　end　of　the　lake　I　found　that　the　river　issued　from　a　low
  aperture；　to　pass　beneath　which　it　was　necessary　that　I　compel
  Woola　to　lie　flat　in　the　boat；　and　I；　myself；　must　need　bend　double
  before　the　low　roof　cleared　my　head。
  Immediately　the　roof　rose　again　upon　the　other　side；　but　no　longer
  was　the　way　brilliantly　lighted。　　Instead　only　a　feeble　glow　emanated
  from　small　and　scattered　patches　of　phosphorescent　rock　in　wall　and　roof。
  Directly　before　me　the　river　ran　into　this　smaller　chamber　through
  three　separate　arched　openings。
  Thurid　and　the　therns　were　nowhere　to　be　seeninto　which　of
  the　dark　holes　had　they　disappeared？　　There　was　no　means　by　which
  I　might　know；　and　so　I　chose　the　center　opening　as　being　as
  likely　to　lead　me　in　the　right　direction　as　another。
  Here　the　way　was　through　utter　darkness。　　The　stream　was　narrow
  so　narrow　that　in　the　blackness　I　was　constantly　bumping　first
  one　rock　wall　and　then　another　as　the　river　wound　hither　and
  thither　along　its　flinty　bed。
  Far　ahead　I　presently　heard　a　deep　and　sullen　roar　which
  increased　in　volume　as　I　advanced；　and　then　broke　upon　my　ears　with
  all　the　intensity　of　its　mad　fury　as　I　swung　round　a　sharp　curve
  into　a　dimly　lighted　stretch　of　water。
  Directly　before　me　the　river　thundered　down　from　above　in　a
  mighty　waterfall　that　filled　the　narrow　gorge　from　side　to　side；
  rising　far　above　me　several　hundred　feetas　magnificent　a
  spectacle　as　I　ever　had　seen。
  But　the　roarthe　awful；　deafening　roar　of　those　tumbling
  waters　penned　in　the　rocky；　subterranean　vault！　　Had　the　fall　not
  entirely　blocked　my　further　passage　and　shown　me　that　I　had
  followed　the　wrong　course　I　believe　that　I　should　have　fled　anyway
  before　the　maddening　tumult。
  Thurid　and　the　therns　could　not　have　come　this　way。　　By
  stumbling　upon　the　wrong　course　I　had　lost　the　trail；　and　they　had
  gained　so　much　ahead　of　me　that　now　I　might　not　be　able　to　find
  them　before　it　was　too　late；　if；　in　fact；　I　could　find　them　at　all。
  It　had　taken　several　hours　to　force　my　way　up　to　the　falls
  against　the　strong　current；　and　other　hours　would　be　required　for
  the　descent；　although　the　pace　would　be　much　swifter。
  With　a　sigh　I　turned　the　prow　of　my　craft　down　stream；　and
  with　mighty　strokes　hastened　with　reckless　speed　through　the　dark
  and　tortuous　channel　until　once　again　I　came　to　the　chamber　into
  which　flowed　the　three　branches　of　the　river。
  Two　unexplored　channels　still　remained　from　which　to　choose；
  nor　was　there　any　means　by　which　I　could　judge　which　was　the　more
  likely　to　lead　me　to　the　plotters。
  Never　in　my　life；　that　I　can　recall；　have　I　suffered　such　an
  agony　of　indecision。　　So　much　depended　upon　a　correct　choice；
  so　much　depended　upon　haste。
  The　hours　that　I　had　already　lost　might　seal　the　fate　of　the
  incomparable　Dejah　Thoris　were　she　not　already　deadto　sacrifice
  other　hours；　and　maybe　days　in　a　fru