Thistimethedescentcommencedbythenewgallery.Hanswalkedfirstaswashiscustom. WehadnotgoneahundredyardswhentheProfessor,movinghislanternalongthewalls,cried: "Hereareprimitiverocks.Nowweareintherightway.Forward!" Wheninitsearlystagestheearthwasslowlycooling,itscontractiongaveriseinitscrusttodisruptions,distortions,fissures,andchasms. Thepassagethroughwhichweweremovingwassuchafissure,throughwhichatonetimegranitepouredoutinamoltenstate. Itsthousandsofwindingsformedaninextricablelabyrinththroughtheprimevalmass. Asfastaswedescended,thesuccessionofbedsformingtheprimitivefoundationcameoutwithincreasingdistinctness. Geologistsconsiderthisprimitivemattertobethebaseofthemineralcrustoftheearth,andhaveascertainedittobecomposedofthreedifferentformations,schist,gneiss,andmicaschist,restinguponthatunchangeablefoundation,thegranite. Neverhadmineralogistsfoundthemselvesinsomarvellousasituationtostudynatureinsitu. Whattheboringmachine,aninsensible,inertinstrument,wasunabletobringtothesurfaceoftheinnerstructureoftheglobe,wewereabletoperusewithourowneyesandhandlewithourownhands. Throughthebedsofschist,colouredwithdelicateshadesofgreen,raninwindingcoursethreadsofcopperandmanganese,withtracesofplatinumandgold. Ithought,whatrichesarehereburiedatanunapproachabledepthintheearth,hiddenforeverfromthecovetouseyesofthehumanrace! Thesetreasureshavebeenburiedatsuchaprofounddepthbytheconvulsionsofprimevaltimesthattheyrunnochanceofeverbeingmolestedbythepickaxeorthespade. Totheschistssucceededgneiss,partiallystratified,remarkablefortheparallelismandregularityofitslamina,thenmicaschists,laidinlargeplatesorflakes,revealingtheirlamellatedstructurebythesparkleofthewhiteshiningmica. Thelightfromourapparatus,reflectedfromthesmallfacetsofquartz,shotsparklingraysateveryangle,andIseemedtobemovingthroughadiamond,withinwhichthequicklydartingraysbrokeacrosseachotherinathousandflashingcoruscations. Aboutsixo'clockthisbrilliantfeteofilluminationsunderwentasensibleabatementofsplendour,thenalmostceased. Thewallsassumedacrystallisedthoughsombreappearance;micawasmorecloselymingledwiththefeldsparandquartztoformtheproperrockyfoundationsoftheearth,whichbearswithoutdistortionorcrushingtheweightofthefourterrestrialsystems. Wewereimmuredwithinprisonwallsofgranite. Itwaseightintheevening.Nosignsofwaterhadyetappeared.Iwassufferinghorribly.Myunclestrodeon.Herefusedtostop. Hewaslisteninganxiouslyforthemurmurofdistantsprings.But,no,therewasdeadsilence. Andnowmylimbswerefailingbeneathme. Iresistedpainandtorture,thatImightnotstopmyuncle,whichwouldhavedrivenhimtodespair,forthedaywasdrawingneartoitsend,anditwashislast. AtlastIfailedutterly;Iutteredacryandfell. Myuncleretracedhissteps.Hegazeduponmewithhisarmscrossed;thenthesemutteredwordspassedhislips: ThelastthingIsawwasafearfulgestureofrage,andmyeyesclosed. WhenIreopenedthemIsawmytwocompanionsmotionlessandrolledupintheircoverings.Weretheyasleep? Asforme,Icouldnotgetonemoment'ssleep. Iwassufferingtookeenly,andwhatembitteredmythoughtswasthattherewasnoremedy. Myuncle'slastwordsechoedpainfullyinmyears:"it'sallover!" Forinsuchafearfulstateofdebilityitwasmadnesstothinkofeverreachingtheupperworldagain. Wehadaboveusaleagueandahalfofterrestrialcrust. Theweightofitseemedtobecrushingdownuponmyshoulders. Ifeltweigheddown,andIexhaustedmyselfwithimaginaryviolentexertionstoturnrounduponmygranitecouch. Afewhourspassedaway.Adeepsilencereignedaroundus,thesilenceofthegrave.Nosoundcouldreachusthroughwalls,thethinnestofwhichwerefivemilesthick. YetinthemidstofmystupefactionIseemedtobeawareofanoise.Itwasdarkdownthetunnel,butIseemedtoseetheIcelandervanishingfromoursightwiththelampinhishand. Whywasheleavingus?WasHansgoingtoforsakeus?Myunclewasfastasleep. Iwantedtoshout,butmyvoicedieduponmyparchedandswollenlips. Thedarknessbecamedeeper,andthelastsounddiedawayinthefardistance. "Hanshasabandonedus,"Icried."Hans!Hans!" Butthesewordswereonlyspokenwithinme.Theywentnofarther. YetafterthefirstmomentofterrorIfeltashamedofsuspectingamanofsuchextraordinaryfaithfulness. Insteadofascendinghewasdescendingthegallery. Anevildesignwouldhavetakenhimupnotdown. Thisreflectionrestoredmetocalmness,andIturnedtootherthoughts. Nonebutsomeweightymotivecouldhaveinducedsoquietamantoforfeithissleep.Washeonajourneyofdiscovery? Hadheduringthesilenceofthenightcaughtasound,amurmuringofsomethinginthedistance,whichhadfailedtoaffectmyhearing?