and　with　a　mighty　sweep　hurled　his　weapon　point　foremost
  at　the　green　warrior。　　It　flew　true　as　an　arrow　and　piercing
  the　poor　devil's　heart　laid　him　dead　upon　the　arena。
  Kantos　Kan　and　I　were　now　pitted　against　each　other　but
  as　we　approached　to　the　encounter　I　whispered　to　him　to
  prolong　the　battle　until　nearly　dark　in　the　hope　that　we
  might　find　some　means　of　escape。　　The　horde　evidently
  guessed　that　we　had　no　hearts　to　fight　each　other　and　so
  they　howled　in　rage　as　neither　of　us　placed　a　fatal　thrust。
  Just　as　I　saw　the　sudden　coming　of　dark　I　whispered　to
  Kantos　Kan　to　thrust　his　sword　between　my　left　arm　and　my
  body。　　As　he　did　so　I　staggered　back　clasping　the　sword
  tightly　with　my　arm　and　thus　fell　to　the　ground　with　his
  weapon　apparently　protruding　from　my　chest。　　Kantos　Kan
  perceived　my　coup　and　stepping　quickly　to　my　side　he　placed　his
  foot　upon　my　neck　and　withdrawing　his　sword　from　my　body
  gave　me　the　final　death　blow　through　the　neck　which　is　supposed
  to　sever　the　jugular　vein；　but　in　this　instance　the　cold
  blade　slipped　harmlessly　into　the　sand　of　the　arena。　　In　the
  darkness　which　had　now　fallen　none　could　tell　but　that　he
  had　really　finished　me。　　I　whispered　to　him　to　go　and　claim
  his　freedom　and　then　look　for　me　in　the　hills　east　of　the
  city；　and　so　he　left　me。
  When　the　amphitheater　had　cleared　I　crept　stealthily　to
  the　top　and　as　the　great　excavation　lay　far　from　the　plaza
  and　in　an　untenanted　portion　of　the　great　dead　city　I　had
  little　trouble　in　reaching　the　hills　beyond。
  CHAPTER　XX
  IN　THE　ATMOSPHERE　FACTORY
  For　two　days　I　waited　there　for　Kantos　Kan；　but　as　he　did
  not　come　I　started　off　on　foot　in　a　northwesterly　direction
  toward　a　point　where　he　had　told　me　lay　the　nearest　waterway。
  My　only　food　consisted　of　vegetable　milk　from　the
  plants　which　gave　so　bounteously　of　this　priceless　fluid。
  Through　two　long　weeks　I　wandered；　stumbling　through
  the　nights　guided　only　by　the　stars　and　hiding　during　the
  days　behind　some　protruding　rock　or　among　the　occasional
  hills　I　traversed。　　Several　times　I　was　attacked　by　wild　beasts；
  strange；　uncouth　monstrosities　that　leaped　upon　me　in　the
  dark；　so　that　I　had　ever　to　grasp　my　long…sword　in　my　hand
  that　I　might　be　ready　for　them。　　Usually　my　strange；　newly
  acquired　telepathic　power　warned　me　in　ample　time；　but
  once　I　was　down　with　vicious　fangs　at　my　jugular　and　a
  hairy　face　pressed　close　to　mine　before　I　knew　that　I　was
  even　threatened。
  What　manner　of　thing　was　upon　me　I　did　not　know；　but
  that　it　was　large　and　heavy　and　many…legged　I　could　feel。
  My　hands　were　at　its　throat　before　the　fangs　had　a　chance　to
  bury　themselves　in　my　neck；　and　slowly　I　forced　the　hairy　face
  from　me　and　closed　my　fingers；　vise…like；　upon　its　windpipe。
  Without　sound　we　lay　there；　the　beast　exerting　every　effort
  to　reach　me　with　those　awful　fangs；　and　I　straining　to
  maintain　my　grip　and　choke　the　life　from　it　as　I　kept　it　from
  my　throat。　　Slowly　my　arms　gave　to　the　unequal　struggle；
  and　inch　by　inch　the　burning　eyes　and　gleaming　tusks　of　my
  antagonist　crept　toward　me；　until；　as　the　hairy　face　touched
  mine　again；　I　realized　that　all　was　over。　　And　then　a　living
  mass　of　destruction　sprang　from　the　surrounding　darkness
  full　upon　the　creature　that　held　me　pinioned　to　the　ground。
  The　two　rolled　growling　upon　the　moss；　tearing　and　rending
  one　another　in　a　frightful　manner；　but　it　was　soon　over　and
  my　preserver　stood　with　lowered　head　above　the　throat　of
  the　dead　thing　which　would　have　killed　me。
  The　nearer　moon；　hurtling　suddenly　above　the　horizon
  and　lighting　up　the　Barsoomian　scene；　showed　me　that　my
  preserver　was　Woola；　but　from　whence　he　had　come；　or　how
  found　me；　I　was　at　a　loss　to　know。　　That　I　was　glad　of　his
  companionship　it　is　needless　to　say；　but　my　pleasure　at　seeing
  him　was　tempered　by　anxiety　as　to　the　reason　of　his　leaving
  Dejah　Thoris。　　Only　her　death　I　felt　sure；　could　account　for
  his　absence　from　her；　so　faithful　I　knew　him　to　be　to　my
  commands。
  By　the　light　of　the　now　brilliant　moons　I　saw　that　he　was
  but　a　shadow　of　his　former　self；　and　as　he　turned　from　my
  caress　and　commenced　greedily　to　devour　the　dead　carcass
  at　my　feet　I　realized　that　the　poor　fellow　was　more　than　half
  starved。　　I；　myself；　was　in　but　little　better　plight　but　I　could
  not　bring　myself　to　eat　the　uncooked　flesh　and　I　had　no
  means　of　making　a　fire。　　When　Woola　had　finished　his　meal
  I　again　took　up　my　weary　and　seemingly　endless　wandering
  in　quest　of　the　elusive　waterway。
  At　daybreak　of　the　fifteenth　day　of　my　search　I　was　overjoyed
  to　see　the　high　trees　that　denoted　the　object　of　my　search。
  About　noon　I　dragged　myself　wearily　to　the　portals　of　a
  huge　building　which　covered　perhaps　four　square　miles
  and　towered　two　hundred　feet　in　the　air。　　It　showed　no
  aperture　in　the　mighty　walls　other　than　the　tiny　door　at　which
  I　sank　exhausted；　nor　was　there　any　sign　of　life　about　it。
  I　could　find　no　bell　or　other　method　of　making　my　presence
  known　to　the　inmates　of　the　place；　unless　a　small　round
  role　in　the　wall　near　the　door　was　for　that　purpose。　　It　was
  of　about　the　bigness　of　a　lead　pencil　and　thinking　that　it
  might　be　in　the　nature　of　a　speaking　tube　I　put　my　mouth　to
  it　and　was　about　to　call　into　it　when　a　voice　issued　from　it
  asking　me　whom　I　might　be；　where　from；　and　the　nature　of
  my　errand。
  I　explained　that　I　had　escaped　from　the　Warhoons　and
  was　dying　of　starvation　and　exhaustion。
  〃You　wear　the　metal　of　a　green　warrior　and　are　followed
  by　a　calot；　yet　you　are　of　the　figure　of　a　red　man。　　In　color
  you　are　neither　green　nor　red。　　In　the　name　of　the　ninth　day；
  what　manner　of　creature　are　you？〃
  〃I　am　a　friend　of　the　red　men　of　Barsoom　and　I　am　starving。
  In　the　name　of　humanity　open　to　us；〃　I　replied。
  Presently　the　door　commenced　to　recede　before　me　until　it　had
  sunk　into　the　wall　fifty　feet；　then　it　stopped　and　slid　easily
  to　the　left；　exposing　a　short；　narrow　corridor　of　concrete；
  at　the　further　end　of　which　was　another　door；　similar　in
  every　respect　to　the　one　I　had　just　passed。　　No　one　was　in
  sight；　yet　immediately　we　passed　the　first　door　it　slid　gently
  into　place　behind　us　and　receded　rapidly　to　its　original　position
  in　the　front　wall　of　the　building。　　As　the　door　had　slipped
  aside　I　had　noted　its　great　thickness；　fully　twenty　feet；　and
  as　it　reached　its　place　once　more　after　closing　behind　us；
  great　cylinders　of　steel　had　dropped　from　the　ceiling　behind
  it　and　fitted　their　lower　ends　into　apertures　countersunk　in
  the　floor。
  A　second　and　third　door　receded　before　me　and　slipped　to　one
  side　as　the　first；　before　I　reached　a　large　inner　chamber
  where　I　found　food　and　drink　set　out　upon　a　great　stone　table。
  A　voice　directed　me　to　satisfy　my　hunger　and　to　feed
  my　calot；　and　while　I　was　thus　engaged　my　invisible　host
  put　me　through　a　severe　and　searching　cross…examination。
  〃Your　statements　are　most　remarkable；〃　said　the　voice；　on
  concluding　its　questioning；　〃but　you　are　evidently　speaking　the
  truth；　and　it　is　equally　evident　that　you　are　not　of　Barsoom。
  I　can　tell　that　by　the　conformation　of　your　brain　and　the
  strange　location　of　your　internal　organs　and　the　shape　and
  size　of　your　heart。〃
  〃Can　you　see　through　me？〃　I　exclaimed。
  〃Yes；　I　can　see　all　but　your　thoughts；　and　were　you　a　Barsoomian
  I　could　read　those。〃
  Then　a　door　opened　at　the　far　side　of　the　chamber　and　a
  strange；　dried　up；　little　mummy　of　a　man　came　toward　me。
  He　wore　but　a　single　article　of　clothing　or　adornment；　a
  small　collar　of　gold　from　which　depended　upon　his　chest　a
  great　ornament　as　large　as　a　dinner　plate　set　solid　with　huge
  diamonds；　except　for　the　exact　center　which　was　occupied
  by　a　strange　stone；　an　inch　in　diameter；　that　scintillated　nine
  different　and　distinct　rays；　the　seven　colors　of　our　earthly
  prism　and　two　beautiful　rays　which；　to　me；　were　new　and
  nameless。　　I　cannot　describe　them　any　more　than　you　could
  describe　red　to　a　blind　man。　　I　only　know　that　they　were
  beautiful　in　the　extreme。
  The　old　man　sat　and　talked　with　me　for　hours；　and　the
  strangest　part　of　our　intercourse　was　that　I　could　read　his
  every　thought　while　he　could　not　fathom　an　iota　from　my
  mind　unless　I　spoke。
  I　did　not　apprise　him　of　my　ability　to　sense　his　mental
  operations；　and　thus　I　learned　a　great　deal　which　proved　of
  immense　value　to　me　later　and　which　I　would　never　have
  known　had　he　suspected　my　strange　power；　for　the　Martians
  have　such　perfect　control　of　their　mental　machinery　that　they
  are　able　to　direct　their　thoughts　with　absolute　precision。
  The　building　in　which　I　found　myself　contained　the　machinery
  which　produces　that　artificial　atmosphere　which　sustains
  life　on　Mars。　　The　secret　of　the　entire　process　hinges　on
  the　use　of　the　ninth　ray；　one　of　the　beautiful　scintillations
  which　I　had　noted　emanatin