have　long　searched　for　in　vain。　　If　he　did　not　succeed　in
  outwitting　me；　he　can　yet　easily　outwit　any　police。　　This　man　who；
  four　years　ago；　introduced　himself　to　the　Surete；　and　became
  celebrated　as　Frederic　Larsan；　is　notorious　under　another　name　…　a
  name　well　known　to　crime。　　Frederic　Larsan；　Monsieur　President；
  is　Ballmeyer！〃
  〃Ballmeyer！〃　cried　the　President。
  〃Ballmeyer！〃　exclaimed　Robert　Darzac；　springing　to　his　feet。
  〃Ballmeyer！　…　It　was　true；　then！〃
  〃Ah！　　Monsieur　Darzac；　you　don't　think　I　am　mad；　now！〃　cried
  Rouletabille。
  Ballmeyer！　　Ballmeyer！　　No　other　word　could　be　heard　in　the
  courtroom。　　The　President　adjourned　the　hearing。
  Those　of　my　readers　who　may　not　have　heard　of　Ballmeyer　will　wonder
  at　the　excitement　the　name　caused。　　And　yet　the　doings　of　this
  remarkable　criminal　form　the　subject…matter　of　the　most　dramatic
  narratives　of　the　newspapers　and　criminal　records　of　the　past　twenty
  years。　　It　had　been　reported　that　he　was　dead；　and　thus　had　eluded
  the　police　as　he　had　eluded　them　throughout　the　whole　of　his　career。
  Ballmeyer　was　the　best　specimen　of　the　high…class　〃gentleman
  swindler。〃　　He　was　adept　at　sleight　of　hand　tricks；　and　no　bolder
  or　more　ruthless　crook　ever　lived。　　He　was　received　in　the　best
  society；　and　was　a　member　of　some　of　the　most　exclusive　clubs。　　On
  many　of　his　depredatory　expeditions　he　had　not　hesitated　to　use
  the　knife　and　the　mutton…bone。　　No　difficulty　stopped　him　and　no
  〃operation〃　was　too　dangerous。　　He　had　been　caught；　but　escaped
  on　the　very　morning　of　his　trial；　by　throwing　pepper　into　the
  eyes　of　the　guards　who　were　conducting　him　to　Court。　　It　was　known
  later　that；　in　spite　of　the　keen　hunt　after　him　by　the　most　expert
  of　detectives；　he　had　sat　that　same　evening　at　a　first　performance
  in　the　Theatre　Francais；　without　the　slightest　disguise。
  He　left　France；　later；　to　〃work〃　America；　The　police　there
  succeeded　in　capturing　him　once；　but　the　extraordinary　man　escaped
  the　next　day。　　It　would　need　a　volume　to　recount　the　adventures　of
  this　master…criminal。　　And　yet　this　was　the　man　Rouletabille　had
  allowed　to　get　away！　　Knowing　all　about　him　and　who　he　was；　he
  afforded　the　criminal　an　opportunity　for　another　laugh　at　the
  society　he　had　defied！　　I　could　not　help　admiring　the　bold　stroke
  of　the　young　journalist；　because　I　felt　certain　his　motive　had　been
  to　protect　both　Mademoiselle　Stangerson　and　rid　Darzac　of　an　enemy
  at　the　same　time。
  The　crowd　had　barely　recovered　from　the　effect　of　the　astonishing
  revelation　when　the　hearing　was　resumed。　　The　question　in　everybody's
  mind　was：　Admitting　that　Larsan　was　the　murderer；　how　did　he　get　out
  of　The　Yellow　Room？
  Rouletabille　was　immediately　called　to　the　bar　and　his　examination
  continued。
  〃You　have　told　us；〃　said　the　President；　〃that　it　was　impossible　to
  escape　from　the　end　of　the　court。　　Since　Larsan　was　leaning　out　of
  his　window；　he　had　left　the　court。　　How　did　he　do　that？〃
  〃He　escaped　by　a　most　unusual　way。　　He　climbed　the　wall；　sprang
  onto　the　terrace；　and；　while　we　were　engaged　with　the　keeper's　body；
  reached　the　gallery　by　the　window。　　He　then　had　little　else　to　do
  than　to　open　the　window；　get　in　and　call　out　to　us；　as　if　he　had
  just　come　from　his　own　room。　　To　a　man　of　Ballmeyer's　strength　all
  that　was　mere　child's　play。　　And　here；　Monsieur；　is　the　proof　of
  what　I　say。〃
  Rouletabille　drew　from　his　pocket　a　small　packet；　from　which　he
  produced　a　strong　iron　peg。
  〃This；　Monsieur；〃　he　said；　〃is　a　spike　which　perfectly　fits　a　hole
  still　to　be　seen　in　the　cornice　supporting　the　terrace。　　Larsan；
  who　thought　and　prepared　for　everything　in　case　of　any　emergency；
  had　fixed　this　spike　into　the　cornice。　　All　he　had　to　do　to　make
  his　escape　good　was　to　plant　one　foot　on　a　stone　which　is　placed
  at　the　corner　of　the　chateau；　another　on　this　support；　one　hand
  on　the　cornice　of　the　keeper's　door　and　the　other　on　the　terrace；
  and　Larsan　was　clear　of　the　ground。　　The　rest　was　easy。　　His　acting
  after　dinner　as　if　he　had　been　drugged　was　make　believe。　　He　was
  not　drugged；　but　he　did　drug　me。　　Of　course　he　had　to　make　it
  appear　as　if　he　also　had　been　drugged　so　that　no　suspicion　should
  fall　on　him　for　my　condition。　　Had　I　not　been　thus　overpowered；
  Larsan　would　never　have　entered　Mademoiselle　Stangerson's　chamber
  that　night；　and　the　attack　on　her　would　not　have　taken　place。〃
  A　groan　came　from　Darzac；　who　appeared　to　be　unable　to　control
  his　suffering。
  〃You　can　understand；〃　added　Rouletabile；　〃that　Larsan　would　feel
  himself　hampered　from　the　fact　that　my　room　was　so　close　to　his；　and
  from　a　suspicion　that　I　would　be　on　the　watch　that　night。　　Naturally；
  he　could　not　for　a　moment　believe　that　I　suspected　him！　　But　I　might
  see　him　leaving　his　room　when　he　was　about　to　go　to　Mademoiselle
  Stangerson。　　He　waited　till　I　was　asleep；　and　my　friend　Sainclair
  was　busy　trying　to　rouse　me。　　Ten　minutes　after　that　Mademoiselle
  was　calling　out；　〃Murder！〃
  〃How　did　you　come　to　suspect　Larsan？〃　asked　the　President。
  〃My　pure　reason　pointed　to　him。　　That　was　why　I　watched　him。　　But
  I　did　not　foresee　the　drugging。　　He　is　very　cunning。　　Yes；　my　pure
  reason　pointed　to　him；　but　I　required　tangible　proof　so　that　my
  eyes　could　see　him　as　my　pure　reason　saw　him。〃
  〃What　do　you　mean　by　your　pure　reason？〃
  〃That　power　of　one's　mind　which　admits　of　no　disturbing　elements
  to　a　conclusion。　　The　day　following　the　incident　of　'the
  inexplicable　gallery；'　I　felt　myself　losing　control　of　it。　　I　had
  allowed　myself　to　be　diverted　by　fallacious　evidence；　but　I
  recovered　and　again　took　hold　of　the　right　end。　　I　satisfied　myself
  that　the　murderer　could　not　have　left　the　gallery；　either　naturally
  or　supernaturally。　　I　narrowed　the　field　of　consideration　to　that
  small　circle；　so　to　speak。　　The　murderer　could　not　be　outside　that
  circle。　　Now　who　was　in　it？　　There　was；　first；　the　murderer。　　Then
  there　were　Daddy　Jacques；　Monsieur　Stangerson；　Frederic　Larsan；　and
  myself。　　Five　persons　in　all；　counting　in　the　murderer。　　And　yet；
  in　the　gallery；　there　were　but　four。　　Now　since　it　had　been
  demonstrated　to　me　that　the　fifth　could　not　have　escaped；　it　was
  evident　that　one　of　the　four　present　in　the　gallery　must　be　a　double
  …　he　must　be　himself　and　the　murderer　also。　　Why　had　I　not　seen
  this　before？　　Simply　because　the　phenomenon　of　the　double　personality
  had　not　occurred　before　in　this　inquiry。
  〃Now　who　of　the　four　persons　in　the　gallery　was　both　that　person
  and　the　assassin？　　I　went　over　in　my　mind　what　I　had　seen。　　I　had
  seen　at　one　and　the　same　time；　Monsieur　Stangerson　and　the　murderer；
  Daddy　Jacques　and　the　murderer；　myself　and　the　murderer；　so　that
  the　murderer；　then；　could　not　be　either　Monsieur　Stangerson；　Daddy
  Jacques；　or　myself。　　Had　I　seen　Frederic　Larsan　and　the　murderer
  at　the　same　time？　…　No！　…　Two　seconds　had　passed；　during　which　I
  lost　sight　of　the　murderer；　for；　as　I　have　noted　in　my　papers；　he
  arrived　two　seconds　before　Monsieur　Stangerson；　Daddy　Jacques；　and
  myself　at　the　meeting…point　of　the　two　galleries。　　That　would　have
  given　Larsan　time　to　go　through　the　'off…turning'　gallery；　snatch
  off　his　false　beard；　return；　and　hurry　with　us　as　if；　like　us；　in
  pursuit　of　the　murderer。　　I　was　sure　now　I　had　got　hold　of　the
  right　end　in　my　reasoning。　　With　Frederic　Larsan　was　now　always
  associated；　in　my　mind；　the　personality　of　the　unknown　of　whom　I
  was　in　pursuit　…　the　murderer；　in　other　words。
  〃That　revelation　staggered　me。　　I　tried　to　regain　my　balance　by
  going　over　the　evidences　previously　traced；　but　which　had　diverted
  my　mind　and　led　me　away　from　Frederic　Larsan。　　What　were　these
  evidences？
  〃1st。　　I　had　seen　the　unknown　in　Mademoiselle　Stangerson's　chamber。
  On　going　to　Frederic　Larsan's　room；　I　had　found　Larsan　sound　asleep。
  〃2nd。　　The　ladder。
  〃3rd。　　I　had　placed　Frederic　Larsan　at　the　end　of　the　'off…turning'
  gallery　and　had　told　him　that　I　would　rush　into　Mademoiselle
  Stangerson's　room　to　try　to　capture　the　murderer。　　Then　I　returned
  to　Mademoiselle　Stangerson's　chamber　where　I　had　seen　the　unknown。
  〃The　first　evidence　did　not　disturb　me　much。　　It　is　likely　that；
  when　I　descended　from　my　ladder；　after　having　seen　the　unknown　in
  Mademoiselle　Stangerson's　chamber；　Larsan　had　already　finished　what
  he　was　doing　there。　　Then；　while　I　was　re…entering　the　chateau；
  Larsan　went　back　to　his　own　room　and；　undressing　himself；　went　to
  sleep。
  〃Nor　did　the　second　evidence　trouble　me。　　If　Larsan　were　the
  murderer；　he　could　have　no　use　for　a　ladder；　but　the　ladder　might
  have　been　placed　there　to　give　an　appearance　to　the　murderer's
  entrance　from　without　the　chateau；　especially　as　Larsan　had　accused
  Darzac　and　Darzac　was　not　in　the　chateau　that　night。　　Further；　the
  ladder　might　have　been　placed　there　to　facilitate　Larsan's　flight
  in　case　of　absolute　necessity。
  〃But　the　third　evidence　puzzled　me　altogether。　　Having　placed　Larsan
  at　the　end　of　the　'off…turning　gallery；'　I　could　not　explain　how　he
  had　taken　advantage　of　the　moment　when　I　had　gone　to　the　left　wing
  of　the　chateau　to　find　Monsieur　Stangerson　and　Daddy　Jacques；　to
  return　to　Mademoiselle　Stangerson's　room。　　It　was　a　very　dangerous
  thing　to　do。　　He　risked　being