to　parklike　symmetry　by　the　browsing　of　the　ghoulish　plant　men。
  Before　me　lay　the　Lost　Sea　of　Korus；　while　farther　on　I　caught
  the　shimmering　ribbon　of　Iss；　the　River　of　Mystery；　where　it　wound
  out　from　beneath　the　Golden　Cliffs　to　empty　into　Korus；　to　which
  for　countless　ages　had　been　borne　the　deluded　and　unhappy　Martians
  of　the　outer　world　upon　the　voluntary　pilgrimage　to　this　false　heaven。
  The　plant　men；　with　their　blood…sucking　hands；　and　the　monstrous
  white　apes　that　make　Dor　hideous　by　day；　were　hidden　in　their
  lairs　for　the　night。
  There　was　no　longer　a　Holy　Thern　upon　the　balcony　in　the　Golden
  Cliffs　above　the　Iss　to　summon　them　with　weird　cry　to　the　victims
  floating　down　to　their　maws　upon　the　cold；　broad　bosom　of　ancient　Iss。
  The　navies　of　Helium　and　the　First　Born　had　cleared　the
  fortresses　and　the　temples　of　the　therns　when　they　had　refused　to
  surrender　and　accept　the　new　order　of　things　that　had　swept　their
  false　religion　from　long…suffering　Mars。
  In　a　few　isolated　countries　they　still　retained　their　age…old
  power；　but　Matai　Shang；　their　hekkador；　Father　of　Therns；　had　been
  driven　from　his　temple。　　Strenuous　had　been　our　endeavors　to
  capture　him；　but　with　a　few　of　the　faithful　he　had　escaped；　and　was
  in　hidingwhere　we　knew　not。
  As　I　came　cautiously　to　the　edge　of　the　low　cliff　overlooking
  the　Lost　Sea　of　Korus　I　saw　Thurid　pushing　out　upon　the　bosom　of
  the　shimmering　water　in　a　small　skiffone　of　those　strangely
  wrought　craft　of　unthinkable　age　which　the　Holy　Therns；　with　their
  organization　of　priests　and　lesser　therns；　were　wont　to　distribute
  along　the　banks　of　the　Iss；　that　the　long　journey　of　their　victims
  might　be　facilitated。
  Drawn　up　on　the　beach　below　me　were　a　score　of　similar　boats；
  each　with　its　long　pole；　at　one　end　of　which　was　a　pike；　at　the
  other　a　paddle。　　Thurid　was　hugging　the　shore；　and　as　he　passed　out
  of　sight　round　a　near…by　promontory　I　shoved　one　of　the　boats　into
  the　water　and；　calling　Woola　into　it；　pushed　out　from　shore。
  The　pursuit　of　Thurid　carried　me　along　the　edge　of　the　sea
  toward　the　mouth　of　the　Iss。　　The　farther　moon　lay　close　to　the
  horizon；　casting　a　dense　shadow　beneath　the　cliffs　that　fringed　the
  water。　　Thuria；　the　nearer　moon；　had　set；　nor　would　it　rise　again
  for　near　four　hours；　so　that　I　was　ensured　concealing　darkness　for
  that　length　of　time　at　least。
  On　and　on　went　the　black　warrior。　　Now　he　was　opposite　the
  mouth　of　the　Iss。　　Without　an　instant's　hesitation　he　turned　up　the
  grim　river；　paddling　hard　against　the　strong　current。
  After　him　came　Woola　and　I；　closer　now；　for　the　man　was　too
  intent　upon　forcing　his　craft　up　the　river　to　have　any　eyes　for
  what　might　be　transpiring　behind　him。　　He　hugged　the　shore　where
  the　current　was　less　strong。
  Presently　he　came　to　the　dark　cavernous　portal　in　the　face　of
  the　Golden　Cliffs；　through　which　the　river　poured。　　On　into　the
  Stygian　darkness　beyond　he　urged　his　craft。
  It　seemed　hopeless　to　attempt　to　follow　him　here　where　I　could
  not　see　my　hand　before　my　face；　and　I　was　almost　on　the　point　of
  giving　up　the　pursuit　and　drifting　back　to　the　mouth　of　the　river；
  there　to　await　his　return；　when　a　sudden　bend　showed　a　faint
  luminosity　ahead。
  My　quarry　was　plainly　visible　again；　and　in　the　increasing
  light　from　the　phosphorescent　rock　that　lay　embedded　in　great
  patches　in　the　roughly　arched　roof　of　the　cavern　I　had　no
  difficulty　in　following　him。
  It　was　my　first　trip　upon　the　bosom　of　Iss；　and　the　things
  I　saw　there　will　live　forever　in　my　memory。
  Terrible　as　they　were；　they　could　not　have　commenced　to
  approximate　the　horrible　conditions　which　must　have　obtained　before
  Tars　Tarkas；　the　great　green　warrior；　Xodar；　the　black　dator；　and
  I　brought　the　light　of　truth　to　the　outer　world　and　stopped　the　mad
  rush　of　millions　upon　the　voluntary　pilgrimage　to　what　they　believed
  would　end　in　a　beautiful　valley　of　peace　and　happiness　and　love。
  Even　now　the　low　islands　which　dotted　the　broad　stream　were　choked
  with　the　skeletons　and　half　devoured　carcasses　of　those　who；
  through　fear　or　a　sudden　awakening　to　the　truth；　had　halted　almost
  at　the　completion　of　their　journey。
  In　the　awful　stench　of　these　frightful　charnel　isles　haggard
  maniacs　screamed　and　gibbered　and　fought　among　the　torn　remnants　of
  their　grisly　feasts；　while　on　those　which　contained　but　clean…
  picked　bones　they　battled　with　one　another；　the　weaker　furnishing
  sustenance　for　the　stronger；　or　with　clawlike　hands　clutched　at　the
  bloated　bodies　that　drifted　down　with　the　current。
  Thurid　paid　not　the　slightest　attention　to　the　screaming　things
  that　either　menaced　or　pleaded　with　him　as　the　mood　directed
  themevidently　he　was　familiar　with　the　horrid　sights　that
  surrounded　him。　　He　continued　up　the　river　for　perhaps　a　mile；
  and　then；　crossing　over　to　the　left　bank；　drew　his　craft　up　on
  a　low　ledge　that　lay　almost　on　a　level　with　the　water。
  I　dared　not　follow　across　the　stream；　for　he　most　surely　would
  have　seen　me。　　Instead　I　stopped　close　to　the　opposite　wall　beneath
  an　overhanging　mass　of　rock　that　cast　a　dense　shadow　beneath　it。
  Here　I　could　watch　Thurid　without　danger　of　discovery。
  The　black　was　standing　upon　the　ledge　beside　his　boat；　looking
  up　the　river；　as　though　he　were　awaiting　one　whom　he　expected
  from　that　direction。
  As　I　lay　there　beneath　the　dark　rocks　I　noticed　that　a　strong
  current　seemed　to　flow　directly　toward　the　center　of　the　river；
  so　that　it　was　difficult　to　hold　my　craft　in　its　position。　　I　edged
  farther　into　the　shadow　that　I　might　find　a　hold　upon　the　bank；
  but；　though　I　proceeded　several　yards；　I　touched　nothing；　and　then；
  finding　that　I　would　soon　reach　a　point　from　where　I　could　no
  longer　see　the　black　man；　I　was　compelled　to　remain　where　I　was；
  holding　my　position　as　best　I　could　by　paddling　strongly　against
  the　current　which　flowed　from　beneath　the　rocky　mass　behind　me。
  I　could　not　imagine　what　might　cause　this　strong　lateral　flow；
  for　the　main　channel　of　the　river　was　plainly　visible　to　me　from
  where　I　sat；　and　I　could　see　the　rippling　junction　of　it　and　the
  mysterious　current　which　had　aroused　my　curiosity。
  While　I　was　still　speculating　upon　the　phenomenon；　my
  attention　was　suddenly　riveted　upon　Thurid；　who　had　raised　both
  palms　forward　above　his　head　in　the　universal　salute　of　Martians；
  and　a　moment　later　his　〃Kaor！〃　the　Barsoomian　word　of　greeting；
  came　in　low　but　distinct　tones。
  I　turned　my　eyes　up　the　river　in　the　direction　that　his　were　bent；
  and　presently　there　came　within　my　limited　range　of　vision　a
  long　boat；　in　which　were　six　men。　　Five　were　at　the　paddles；
  while　the　sixth　sat　in　the　seat　of　honor。
  The　white　skins；　the　flowing　yellow　wigs　which　covered　their
  bald　pates；　and　the　gorgeous　diadems　set　in　circlets　of　gold
  about　their　heads　marked　them　as　Holy　Therns。
  As　they　drew　up　beside　the　ledge　upon　which　Thurid　awaited
  them；　he　in　the　bow　of　the　boat　arose　to　step　ashore；　and　then　I
  saw　that　it　was　none　other　than　Matai　Shang；　Father　of　Therns。
  The　evident　cordiality　with　which　the　two　men　exchanged
  greetings　filled　me　with　wonder；　for　the　black　and　white　men　of
  Barsoom　were　hereditary　enemiesnor　ever　before　had　I　known　of
  two　meeting　other　than　in　battle。
  Evidently　the　reverses　that　had　recently　overtaken　both　peoples
  had　resulted　in　an　alliance　between　these　two　individualsat
  least　against　the　common　enemyand　now　I　saw　why　Thurid　had
  come　so　often　out　into　the　Valley　Dor　by　night；　and　that　the
  nature　of　his　conspiring　might　be　such　as　to　strike　very　close
  to　me　or　to　my　friends。
  I　wished　that　I　might　have　found　a　point　closer　to　the　two　men
  from　which　to　have　heard　their　conversation；　but　it　was　out　of　the
  question　now　to　attempt　to　cross　the　river；　and　so　I　lay　quietly
  watching　them；　who　would　have　given　so　much　to　have　known　how　close
  I　lay　to　them；　and　how　easily　they　might　have　overcome　and　killed
  me　with　their　superior　force。
  Several　times　Thurid　pointed　across　the　river　in　my　direction；
  but　that　his　gestures　had　any　reference　to　me　I　did　not　for　a
  moment　believe。　　Presently　he　and　Matai　Shang　entered　the　latter's
  boat；　which　turned　out　into　the　river　and；　swinging　round；　forged
  steadily　across　in　my　direction。
  As　they　advanced　I　moved　my　boat　farther　and　farther　in
  beneath　the　overhanging　wall；　but　at　last　it　became　evident　that
  their　craft　was　holding　the　same　course。　　The　five　paddlers　sent
  the　larger　boat　ahead　at　a　speed　that　taxed　my　energies　to　equal。
  Every　instant　I　expected　to　feel　my　prow　crash　against　solid　rock。
  The　light　from　the　river　was　no　longer　visible；　but　ahead　I
  saw　the　faint　tinge　of　a　distant　radiance；　and　still　the　water
  before　me　was　open。
  At　last　the　truth　dawned　upon　meI　was　following　a　subterranean
  river　which　emptied　into　the　Iss