theauthorwrote:——
"Thislastnaturalist[Haeckel]……hasrecently……publishedhis’NaturlicheSchopfungs—geschichte，’inwhichhefullydiscussesthegenealogyofman。
Ifthisworkhadappearedbeforemyessayhadbeenwritten，Ishouldprobablyneverhavecompletedit。AlmostalltheconclusionsatwhichI
havearrived，Ifindconfirmedbythisnaturalist，whoseknowledgeonmanypointsismuchfullerthanmine。"）IcannottellyouhowgladIamtofindthatIhaveexpressedmyhighadmirationofyourlabourswithsufficientclearness;IamsurethatIhavenotexpressedittoostrongly。"]
CHARLESDARWINTOA。R。WALLACE。
Down，March16，1871。
MydearWallace，Ihavejustreadyourgrandreview。（"Academy"，March15，1871。）Itisineverywayaskindlyexpressedtowardsmyselfasitisexcellentinmatter。
TheLyellshavebeenhere，andSirC。remarkedthatnoonewrotesuchgoodscientificreviewsasyou，andasMissBuckleyadded，youdelightinpickingoutallthatisgood，thoughveryfarfromblindtothebad。InallthisImostentirelyagree。Ishallalwaysconsideryourreviewasagreathonour;andhowevermuchmybookmayhereafterbeabused，asnodoubtitwillbe，yourreviewwillconsoleme，notwithstandingthatwediffersogreatly。Iwillkeepyourobjectionstomyviewsinmymind，butIfearthatthelatterarealmoststereotypedinmymind。Ithoughtforlongweeksabouttheinheritanceandselectiondifficulty，andcoveredquiresofpaperwithnotesintryingtogetoutofit，butcouldnot，thoughclearlyseeingthatitwouldbeagreatreliefifIcould。Iwillconfinemyselftotwoorthreeremarks。Ihavebeenmuchimpressedwithwhatyouurgeagainstcolour（Mr。Wallacesaysthatthepairingofbutterfliesisprobablydeterminedbythefactthatonemaleisstronger—winged，ormorepertinaciousthantherest，ratherthanbythechoiceofthefemales。Hequotesthecaseofcaterpillarswhicharebrightlycolouredandyetsexless。Mr。Wallacealsomakesthegoodcriticismthatthe’DescentofMan’consistsoftwobooksmixedtogether。）inthecaseofinsects，havingbeenacquiredthroughsexualselection。Ialwayssawthattheevidencewasveryweak;butIstillthink，ifitbeadmittedthatthemusicalinstrumentsofinsectshavebeengainedthroughsexualselection，thatthereisnottheleastimprobabilityincolourhavingbeenthusgained。
Yourargumentwithrespecttothedenudationofmankindandalsotoinsects，thattasteonthepartofonesexwouldhavetoremainnearlythesameduringmanygenerations，inorderthatsexualselectionshouldproduceanyeffect，Iagreeto;andIthinkthisargumentwouldbesoundifusedbyonewhodeniedthat，forinstance，theplumesofbirdsofParadisehadbeensogained。Ibelieveyouadmitthis，andifsoIdonotseehowyourargumentappliesinothercases。IhaverecognizedforsomeshorttimethatIhavemadeagreatomissioninnothavingdiscussed，asfarasI
could，theacquisitionoftaste，itsinheritednature，anditspermanencewithinprettycloselimitsforlongperiods。
[Withregardtothesuccessofthe’DescentofMan，’IquotefromalettertoProfessorRayLankester（March22，1871）:——
"Ithinkyouwillbegladtohear，asaproofoftheincreasingliberalityofEngland，thatmybookhassoldwonderfully……andasyetnoabuse（thoughsome，nodoubt，willcome，strongenough），andonlycontempteveninthepoorold’Athenaeum’。"
AstoreviewsthatstruckhimhewrotetoMr。Wallace（March24，1871）:——
"Thereisaverystrikingsecondarticleonmybookinthe’PallMall’。
Thearticlesinthe"Spectator"（"Spectator"，March11and18，1871。Withregardtotheevolutionofconsciencethereviewerthinksthatmyfathercomesmuchnearertothe"kernelofthepsychologicalproblem"thanmanyofhispredecessors。Thesecondarticlecontainsagooddiscussionofthebearingofthebookonthequestionofdesign，andconcludesbyfindinginitavindicationofTheismmorewonderfulthanthatinPaley’s’NaturalTheology。’）havealsointerestedmemuch。"
OnMarch20hewrotetoMr。Murray:——
"Manythanksforthe"Nonconformist"[March8，1871]。Iliketoseeallthatiswritten，anditisofsomerealuse。Ifyouhearofreviewersinout—of—the—waypapers，especiallythereligious，as"Record"，"Guardian"，"Tablet"，kindlyinformme。Itiswonderfulthattherehasbeennoabuse（"Ifeelafullconvictionthatmychapteronmanwillexciteattentionandplentyofabuse，andIsupposeabuseisasgoodaspraiseforsellingabook。"——（fromalettertoMr。Murray，January31，1867。）asyet，butI
supposeIshallnotescape。Onthewhole，thereviewshavebeenhighlyfavourable。"
ThefollowingextractfromalettertoMr。Murray（April13，1871）referstoareviewinthe"Times"。（"Times"，April7and8，1871。Thereviewisnotonlyunfavourableasregardsthebookunderdiscussion，butalsoasregardsEvolutioningeneral，asthefollowingcitationwillshow:"Evenhaditbeenrenderedhighlyprobable，whichwedoubt，thattheanimalcreationhasbeendevelopedintoitsnumerousandwidelydifferentvarietiesbymereevolution，itwouldstillrequireanindependentinvestigationofoverwhelmingforceandcompletenesstojustifythepresumptionthatmanisbutaterminthisself—evolvingseries。"）
"Ihavenoideawhowrotethe"Times"review。Hehasnoknowledgeofscience，andseemstomeawind—bagfullofmetaphysicsandclassics，sothatIdonotmuchregardhisadversejudgment，thoughIsupposeitwillinjurethesale。"
Areviewofthe’DescentofMan，’whichmyfatherspokeofas"capital，"
appearedinthe"SaturdayReview"（March4and11，1871）。Apassagefromthefirstnotice（March4）maybequotedinillustrationofthebroadbasisasregardsgeneralacceptance，onwhichthedoctrineofEvolutionnowstood:"Heclaimstohavebroughtmanhimself，hisoriginandconstitution，withinthatunitywhichhehadpreviouslysoughttotracethroughallloweranimalforms。Thegrowthofopinionintheinterval，dueinchiefmeasuretohisownintermediateworks，hasplacedthediscussionofthisprobleminapositionverymuchinadvanceofthatheldbyitfifteenyearsago。TheproblemofEvolutionishardlyanylongertobetreatedasoneoffirstprinciples;norhasMr。Darwintodobattleforafirsthearingofhiscentralhypothesis，upborneasitisbyaphalanxofnamesfullofdistinctionandpromise，ineitherhemisphere。"
Theinfoldedpointofthehumanear，discoveredbyMr。Woolner，anddescribedinthe’DescentofMan，’seemsespeciallytohavestruckthepopularimagination;myfatherwrotetoMr。Woolner:——
"Thetipstotheearshavebecomequitecelebrated。Onereviewer（’Nature’）saystheyoughttobecalled，asIsuggestedinjoke，AngulusWoolnerianus。（’Nature’April6，1871。ThetermsuggestedisAngulusWoolnerii。）AGermanisveryproudtofindthathehasthetipswelldeveloped，andIbelievewillsendmeaphotographofhisears。"]
CHARLESDARWINTOJOHNBRODIEINNES。（Rev。J。BrodieInnes，ofMiltonBrodie，formerlyVicarofDown。）
Down，May29[1871]。
MydearInnes，Ihavebeenverygladtoreceiveyourpleasantletter，fortotellyouthetruth，Ihavesometimeswonderedwhetheryouwouldnotthinkmeanoutcastandareprobateafterthepublicationofmylastbook[’Descent’]。（Inaformerletterofmyfather’stoMr。Innes:——"Weoftendiffered，butyouareoneofthoseraremortalsfromwhomonecandifferandyetfeelnoshadeofanimosity，andthatisathingwhichIshouldfeelveryproudof，ifanyonecouldsayitofme。"）Idonotwonderatallatyournotagreeingwithme，foragoodmanyprofessednaturalistsdonot。YetwhenIseeinhowextraordinaryamannerthejudgmentofnaturalistshaschangedsinceI
publishedthe’Origin，’Ifeelconvincedthattherewillbeintenyearsquiteasmuchunanimityaboutman，asfarashiscorporealframeisconcerned……
[ThefollowinglettersaddressedtoDr。Ogledealwiththeprogressoftheworkonexpression。]
Down，March12[1871]。
MydearDr。Ogle，Ihavereceivedbothyourletters，andtheytellmeallthatIwantedtoknowintheclearestpossibleway，as，indeed，allyourlettershaveeverdone。Ithankyoucordially。Iwillgivethecaseofthemurderer（’ExpressionoftheEmotions，’page294。Thearrestofamurderer，aswitnessedbyDr。Ogleinahospital。）inmyhobby—horseessayonexpression。IfearthattheEustachiantubequestionmusthavecostyouadealoflabour;itisquiteacompletelittleessay。Itisprettyclearthatthemouthisnotopenedundersurprisemerelytoimprovethehearing。
Yetwhydodeafmengenerallykeeptheirmouthsopen？Theotherdayamanherewasmimickingadeaffriend，leaninghisheadforwardandsidewaystothespeaker，withhismouthwellopen;itwasalifelikerepresentationofadeafman。Shakespearesomewheresays:"Holdyourbreath，listen"or"hark，"Iforgetwhich。Surprisehurriesthebreath，anditseemstomeonecanbreathe，atleasthurriedly，muchquieterthroughtheopenmouththanthroughthenose。Isawtheotherdayyoudoubtedthis。Asobjectionisyourprovinceatpresent，Ithinkbreathingthroughthenoseoughttocomewithinitlikewise，sodoprayconsiderthispoint，andletmehearyourjudgment。Considerthenosetobeaflowertobefertilised，andthenyouwillmakeoutallaboutit。（Dr。Oglehadcorrespondedwithmyfatheronhisownobservationsonthefertilisationofflowers。）Ihavehadtoalludetoyourpaperon’SenseofSmell’（Medico—chirurg。Trans。liii。）;isthepagingright，namely，1，2，3？Ifnot，Iprotestbyallthegodsagainsttheplanfollowedbysome，ofhavingpresentationcopiesfalselypaged;andsodoesRolleston，ashewrotetometheotherday。Inhaste。
Yoursverysincerely，C。DARWIN。
CHARLESDARWINTOW。OGLE。
Down，March25[1871]。
MydearDr。Ogle，Youwillthinkmeahorridbore，butIbegyou，INRELATIONTOANEWPOINT
FOROBSERVATION，toimagineaswellasyoucanthatyousuddenlycomeacrosssomedreadfulobject，andactwithasuddenlittlestart，aSHUDDER
OFHORROR;pleasedothisonceortwice，andobserveyourselfaswellasyoucan，andAFTERWARDSreadtherestofthisnote，whichIhaveconsequentlypinneddown。Ifind，tomysurprise，wheneverIactthusmyplatysmacontracts。Doesyours？（N。B。——Seewhatamanwilldoforscience;Ibeganthisnotewithahorridfib，namely，thatIwantyoutoattendtoanewpoint。（Thepointwasdoubtlessdescribedasanewone，toavoidthepossibilityofDr。Ogle’sattentionbeingdirectedtotheplatysma，amusclewhichhadbeenthesubjectofdiscussioninotherletters。））Iwilltryandgetsomepersonsthustoactwhoaresoluckyasnottoknowthattheyevenpossessthismuscle，sotroublesomeforanyonemakingoutaboutexpression。Isashudderakintotherigororshiveringbeforefever？Ifso，perhapstheplatysmacouldbeobservedinsuchcases。
Pagettoldmethathehadattendedmuchtoshivering，andhadwritteninMS。onthesubject，andbeenmuchperplexedaboutit。Hementionedthatpassingacatheteroftencausesshivering。PerhapsIwillwritetohimabouttheplatysma。Heisalwaysmostkindinaidingmeinallways，butheissooverworkedthatithurtsmyconsciencetotroublehim，forIhaveaconscience，littleasyouhavereasontothinkso。Helpmeifyoucan，andforgiveme。Yourmurderercasehascomeinsplendidlyastheacmeofprostrationfromfear。
Yoursverysincerely，CH。DARWIN。
CHARLESDARWINTODR。OGLE。
Down，April29[1871]。
MydearDr。Ogle，Iamtrulyobligedforallthegreattroublewhichyouhavesokindlytaken。Iamsureyouhavenocausetosaythatyouaresorryyoucangivemenodefiniteinformation，foryouhavegivenmefarmorethanIeverexpectedtoget。Theactionoftheplatysmaisnotveryimportantforme，butIbelievethatyouwillfullyunderstand（forIhavealwaysfanciedthatourmindswereverysimilar）theintolerabledesireIhadnottobeutterlybaffled。NowIknowthatitsometimescontractsfromfearandfromshuddering，butnotapparentlyfromaprolongedstateoffearsuchastheinsanesuffer……
[Mr。Mivart’s’GenesisofSpecies，’——acontributiontotheliteratureofEvolution，whichexcitedmuchattention——waspublishedin1871，beforetheappearanceofthe’DescentofMan。’Tothisbookthefollowingletter（June21，1871）fromthelateChaunceyWrighttomyfatherrefers。
（ChaunceyWrightwasbornatNorthampton，Massachusetts，September20，1830，andcameofafamilysettledinthattownsince1654。Hebecamein1852acomputerintheNauticalAlmanacofficeatCambridge，Mass。，andlivedaquietuneventfullife，supportedbythesmallstipendofhisoffice，andbywhatheearnedfromhisoccasionalarticles，aswellasbyalittleteaching。Hethoughtandreadmuchonmetaphysicalsubjects，butonthewholewithanoutcome（asfarastheworldwasconcerned）notcommensuratetothepowerofhismind。Heseemstohavebeenamanofstrongindividuality，andtohavemadealastingimpressiononhisfriends。
HediedinSeptember，1875。）]:
"Isend……revisedproofsofanarticlewhichwillbepublishedintheJulynumberofthe’NorthAmericanReview，’sendingitinthehopethatitwillinterestorevenbeofgreatervaluetoyou。Mr。Mivart’sbook[’GenesisofSpecies’]ofwhichthisarticleissubstantiallyareview，seemstomeaverygoodbackgroundfromwhichtopresenttheconsiderationswhichIhaveendeavouredtosetforthinthearticle，indefenceandillustrationofthetheoryofNaturalSelection。Myspecialpurposehasbeentocontributetothetheorybyplacingitinitsproperrelationstophilosophicalenquiriesingeneral。"（’LettersofChaunceyWright，’byJ。B。Thayer。Privatelyprinted，1878，page230。）
WithregardtotheproofsreceivedfromMr。Wright，myfatherwrotetoMr。
Wallace:]
Down，July9[1871]。
MydearWallace，IsendbythispostareviewbyChaunceyWright，asImuchwantyouropinionofitassoonasyoucansendit。IconsideryouanincomparablybettercriticthanIam。Thearticle，thoughnotveryclearlywritten，andpoorinpartsfromwantofknowledge，seemstomeadmirable。Mivart’sbookisproducingagreateffectagainstNaturalSelection，andmoreespeciallyagainstme。ThereforeifyouthinkthearticleevensomewhatgoodIwillwriteandgetpermissiontopublishitasashillingpamphlet，togetherwiththeMS。additions（enclosed），forwhichtherewasnotroomattheendofthereview……
Iamnowatworkatanewandcheapeditionofthe’Origin，’andshallanswerseveralpointsinMivart’sbook，andintroduceanewchapterforthispurpose;butItreatthesubjectsomuchmoreconcretely，andIdaresaylessphilosophically，thanWright，thatweshallnotinterferewitheachother。YouwillthinkmeabigotwhenIsay，afterstudyingMivart，I
wasneverbeforeinmylifesoconvincedoftheGENERAL（i。e。notindetail）truthoftheviewsinthe’Origin。’IgrievetoseetheomissionofthewordsbyMivart，detectedbyWright。（’NorthAmericanReview，’
volume113，pages83，84。ChaunceyWrightpointsoutthatthewordsomittedare"essentialtothepointonwhichhe[Mr。Mivart]citesMr。
Darwin’sauthority。"ItshouldbementionedthatthepassagefromwhichwordsareomittedisnotgivenwithininvertedcommasbyMr。Mivart。）I
complainedtoMivartthatintwocaseshequotesonlythecommencementofsentencesbyme，andthusmodifiesmymeaning;butIneversupposedhewouldhaveomittedwords。ThereareothercasesofwhatIconsiderunfairtreatment。Iconcludewithsorrowthatthoughhemeanstobehonourableheissobigotedthathecannotactfairly……
CHARLESDARWINTOCHAUNCEYWRIGHT。
Down，July14，1871。
MydearSir，Ihavehardlyeverinmylifereadanarticlewhichhasgivenmesomuchsatisfactionasthereviewwhichyouhavebeensokindastosendme。I
agreetoalmosteverythingwhichyousay。Yourmemorymustbewonderfullyaccurate，foryouknowmyworksaswellasIdomyself，andyourpowerofgraspingothermen’sthoughtsissomethingquitesurprising;andthis，asfarasmyexperiencegoes，isaveryrarequality。AsIreadonI
perceivedhowyouhaveacquiredthispower，viz。bythoroughlyanalyzingeachword……NowIamgoingtobegafavour。Willyouprovisionallygivemepermissiontoreprintyourarticleasashillingpamphlet？Iaskonlyprovisionally，asIhavenotyethadtimetoreflectonthesubject。Itwouldcostme，Ifancy，withadvertisements，some20or30pounds;buttheworstisthat，asIhear，pamphletsneverwillsell。Andthismakesmedoubtful。ShouldyouthinkittoomuchtroubletosendmeatitleFORTHE
CHANCE？Thetitleought，Ithink，tohaveMr。Mivart’snameonit……Ifyougrantpermissionandsendatitle，youwillkindlyunderstandthatIwillfirstmakefurtherenquirieswhetherthereisanychanceofapamphletbeingread。
Praybelievemeyoursverysincerelyobliged，CH。DARWIN。
[Thepamphletwaspublishedintheautumn，andonOctober23myfatherwrotetoMr。Wright:——
"Itpleasesmemuchthatyouaresatisfiedwiththeappearanceofyourpamphlet。Iamsureitwilldoourcausegoodservice;andthissameopinionHuxleyhasexpressedtome。（’LettersofChaunceyWright，’page235。"]
CHARLESDARWINTOA。R。WALLACE。
Down，July12[1871]……IfeelverydoubtfulhowfarIshallsucceedinansweringMivart，itissodifficulttoanswerobjectionstodoubtfulpoints，andmakethediscussionreadable。Ishallmakeonlyaselection。Theworstofitis，thatIcannotpossiblyhuntthroughallmyreferencesforisolatedpoints，itwouldtakemethreeweeksofintolerablyhardwork。IwishIhadyourpowerofarguingclearly。AtpresentIfeelsickofeverything，andifI
couldoccupymytimeandforgetmydailydiscomforts，orrathermiseries，I
wouldneverpublishanotherword。ButIshallcheerup，Idaresay，soon，havingonlyjustgotoverabadattack。Farewell;GodknowswhyIbotheryouaboutmyself。Icansaynothingmoreaboutmissing—linksthanwhatI
havesaid。Ishouldrelymuchonpre—siluriantimes;butthencomesSirW。
Thomsonlikeanodiousspectre。Farewell……Thereisamostcuttingreviewofmeinthe’Quarterly’（July1871。）;I
haveonlyreadafewpages。TheskillandstylemakemethinkofMivart。
Ishallsoonbeviewedasthemostdespicableofmen。This’QuarterlyReview’temptsmetorepublishCh。Wright，evenifnotreadbyanyone，justtoshowsomeonewillsayawordagainstMivart，andthathis（i。e。
Mivart’s）remarksoughtnottobeswallowedwithoutsomereflection……GodknowswhethermystrengthandspiritwilllastouttowriteachapterversusMivartandothers;IdosohatecontroversyandfeelIshalldoitsobadly。
[Theabove—mentioned’Quarterly’reviewwasthesubjectofanarticlebyMr。HuxleyintheNovembernumberofthe’ContemporaryReview。’Here，also，arediscussedMr。Wallace’s’ContributiontotheTheoryofNaturalSelection，’andthesecondeditionofMr。Mivart’s’GenesisofSpecies。’
WhatfollowsistakenfromMr。Huxley’sarticle。The’Quarterly’reviewer，thoughbeingtosomeextentanevolutionist，believesthatMan"differsmorefromanelephantoragorilla，thandothesefromthedustoftheearthonwhichtheytread。"Therevieweralsodeclaresthatmyfatherhas"withneedlessopposition，setatnaughtthefirstprinciplesofbothphilosophyandreligion。"Mr。Huxleypassesfromthe’Quarterly’
reviewer’sfurtherstatement，thatthereisnonecessaryoppositionbetweenevolutionandreligion，tothemoredefinitepositiontakenbyMr。Mivart，thattheorthodoxauthoritiesoftheRomanCatholicChurchagreeindistinctlyassertingderivativecreation，sothat"theirteachingsharmonisewithallthatmodernsciencecanpossiblyrequire。"HereMr。
Huxleyfeltthewantofthat"studyofChristianphilosophy"（atanyrate，initsJesuiticgarb），whichMr。Mivartspeaksof，anditwasawantheatoncesettoworktofillup。HewasthenstayingatSt。Andrews，whencehewrotetomyfather:——
"Bygreatgoodluckthereisanexcellentlibraryhere，withagoodcopyofSuarez（ThelearnedJesuitonwhomMr。Mivartmainlyrelies。），inadozenbigfolios。AmongtheseIdived，tothegreatastonishmentofthelibrarian，andlookingintothem’asthecarefulrobineyesthedelver’stoil’（vide’Idylls’），Icarriedoffthetwovenerableclaspedvolumeswhichweremostpromising。"EventhosewhoknowMr。Huxley’sunrivalledpoweroftearingtheheartoutofabookmustmarvelattheskillwithwhichhehasmadeSuarezspeakonhisside。"SoIhavecomeout，"hewrote，"inthenewcharacterofadefenderofCatholicorthodoxy，andupsetMivartoutofthemouthofhisownprophet。"
TheremainderofMr。Huxley’scritiqueislargelyoccupiedwithadissectionofthe’Quarterly’reviewer’spsychology，andhisethicalviews。
Hedeals，too，withMr。Wallace’sobjectionstothedoctrineofEvolutionbynaturalcauseswhenappliedtothementalfacultiesofMan。Finally，hedevotesacoupleofpagestojustifyinghisdescriptionofthe’Quarterly’
reviewer’s"treatmentofMr。Darwinasalikeunjustandunbecoming。"
ItwillbeseenthatthetwofollowingletterswerewrittenbeforethepublicationofMr。Huxley’sarticle。]
CHARLESDARWINTOT。H。HUXLEY。
Down，September21[1871]。
MydearHuxley，Yourletterhaspleasedmeinmanyways，toawonderfuldegree……Whatawonderfulmanyouaretograpplewiththoseoldmetaphysico—divinitybooks。
ItquitedelightsmethatyouaregoingtosomeextenttoanswerandattackMivart。Hisbook，asyousay，hasproducedagreateffect;yesterdayI
perceivedthereverberationsfromit，evenfromItaly。ItwasthisthatmademeaskChaunceyWrighttopublishatmyexpensehisarticle，whichseemstomeveryclever，thoughill—written。HehasnotknowledgeenoughtograpplewithMivartindetail。Ithinktherecanbenoshadowofdoubtthatheistheauthorofthearticleinthe’QuarterlyReview’……Iampreparinganeweditionofthe’Origin，’andshallintroduceanewchapterinanswertomiscellaneousobjections，andshallgiveupthegreaterparttoanswerMivart’scasesofdifficultyofincipientstructuresbeingofnouse:andIfinditcanbedoneeasily。Heneverstateshiscasefairly，andmakeswonderfulblunders……Thependulumisnowswingingagainstourside，butIfeelpositiveitwillsoonswingtheotherway;andnomortalmanwilldohalfasmuchasyouingivingitastartintherightdirection，asyoudidatthefirstcommencement。Godforgivemeforwritingsolongandegotisticalaletter;butitisyourfault，foryouhavesodelightedme;Ineverdreamedthatyouwouldhavetimetosayawordindefenceofthecausewhichyouhavesooftendefended。Itwillbealongbattle，afterwearedeadandgone……Greatisthepowerofmisrepresentation……
CHARLESDARWINTOT。H。HUXLEY。
Down，September30[1871]。
MydearHuxley，Itwasverygoodofyoutosendtheproof—sheets，forIwasVERYanxioustoreadyourarticle。Ihavebeendelightedwithit。HowyoudosmashMivart’stheology:itisalmostequaltoyourarticleversusComte（’FortnightlyReview，’1869。WithregardtotherelationsofPositivismtoSciencemyfatherwrotetoMr。Spencerin1875:"HowcuriousandamusingitistoseetowhatanextentthePositivistshateallmenofscience;I
fancytheyaredimlyconsciouswhatlaughableandgiganticblunderstheirprophetmadeinpredictingthecourseofscience。"），——thatnevercanbetranscended……ButIhavebeenpreeminentlygladtoreadyourdiscussionon[the’Quarterly’reviewer’s]metaphysics，especiallyaboutreasonandhisdefinitionofit。Ifeltsurehewaswrong，buthavingonlycommonobservationandsensetotrustto，Ididnotknowwhattosayinmysecondeditionofmy’Descent。’Nowafootnoteandreferencetoyouwilldothework……Forme，thisisoneofthemostIMPORTANTpartsofthereview。ButforPLEASURE，Ihavebeenparticularlygladthatmyfewwords（’DescentofMan，’volumei。page87。Adiscussiononthequestionwhetheranactdoneimpulsivelyorinstinctivelycanbecalledmoral。）onthedistinction，ifitcanbesocalled，betweenMivart’stwoformsofmorality，caughtyourattention。Iamsopleasedthatyoutakethesameview，andgiveauthoritiesforit;butIsearchedMillinvainonthishead。Howwellyouarguethewholecase。Iammountingclimaxonclimax;forafterallthereisnothing，Ithink，betterinyourwholereviewthanyourargumentsv。
Wallaceontheintellectofsavages。ImusttellyouwhatHookersaidtomeafewyearsago。"WhenIreadHuxley，Ifeelquiteinfantileinintellect。"ByJoveIhavefeltthetruthofthisthroughoutyourreview。
Whatamanyouare。Therearescoresofsplendidpassages，andvividflashesofwit。Ihavebeenagooddealmorethanmerelypleasedbytheconcludingpartofyourreview;andallthemore，asIownIfeltmortifiedbytheaccusationofbigotry，arrogance，etc。，inthe’QuarterlyReview。’
ButIassureyou，hemaywritehisworst，andhewillnevermortifymeagain。
MydearHuxley，yoursgratefully，CHARLESDARWIN。
CHARLESDARWINTOF。MULLER。
Haredene，Albury，August2[1871]。
MydearSir，Yourlastletterhasinterestedmegreatly;itiswonderfullyrichinfactsandoriginalthoughts。First，letmesaythatIhavebeenmuchpleasedbywhatyousayaboutmybook。IthashadaVERYLARGEsale;butIhavebeenmuchabusedforit，especiallyforthechapteronthemoralsense;andmostofmyreviewersconsiderthebookasapooraffair。Godknowswhatitsmeritsmayreallybe;allthatIknowisthatIdidmybest。WithfamiliarityIthinknaturalistswillacceptsexualselectiontoagreaterextentthantheynowseeminclinedtodo。Ishouldverymuchliketopublishyourletter，butIdonotseehowitcouldbemadeintelligible，withoutnumerouscolouredillustrations，butIwillconsultMr。Wallaceonthishead。Iearnestlyhopethatyoukeepnotesofallyourletters，andthatsomedayyouwillpublishabook:’NotesofaNaturalistinS。
Brazil，’orsomesuchtitle。WallacewillhardlyadmitthepossibilityofsexualselectionwithLepidoptera，andnodoubtitisveryimprobable。
Therefore，Iamverygladtohearofyourcases（whichIwillquoteinthenextedition）ofthetwosetsofHesperiadae，whichdisplaytheirwingsdifferently，accordingtowhichsurfaceiscoloured。Icannotbelievethatsuchdisplayisaccidentalandpurposeless……
Nofactofyourletterhasinterestedmemorethanthataboutmimicry。Itisacapitalfactaboutthemalespursuingthewrongfemales。YouputthedifficultyofthefirststepsinimitationinamoststrikingandCONVINCINGmanner。Yourideaofsexualselectionhavingaidedprotectiveimitationinterestsmegreatly，forthesameideahadoccurredtomeinquitedifferentcases，viz。thedulnessofallanimalsintheGalapagosIslands，Patagonia，etc。，andinsomeothercases;butIwasafraideventohintatsuchanidea。Wouldyouobjecttomygivingsomesuchsentenceasfollows:"F。Mullersuspectsthatsexualselectionmayhavecomeintoplay，inaidofprotectiveimitation，inaverypeculiarmanner，whichwillappearextremelyimprobabletothosewhodonotfullybelieveinsexualselection。Itisthattheappreciationofcertaincolourisdevelopedinthosespecieswhichfrequentlybeholdotherspeciesthusornamented。"
Againletmethankyoucordiallyforyourmostinterestingletter……
CHARLESDARWINTOE。B。TYLOR。
Down，[September24，1871]。
MydearSir，IhopethatyouwillallowmetohavethepleasureoftellingyouhowgreatlyIhavebeeninterestedbyyour’PrimitiveCulture，’nowthatIhavefinishedit。Itseemstomeamostprofoundwork，whichwillbecertaintohavepermanentvalue，andtobereferredtoforyearstocome。Itiswonderfulhowyoutraceanimismfromthelowerracesuptothereligiousbeliefofthehighestraces。Itwillmakemeforthefuturelookatreligion——abeliefinthesoul，etc。——fromanewpointofview。Howcurious，also，arethesurvivalsorrudimentsofoldcustoms……Youwillperhapsbesurprisedatmywritingatsolateaperiod，butIhavehadthebookreadaloudtome，andfrommuchill—healthoflatecouldonlystandoccasionalshortreads。Theundertakingmusthavecostyougiganticlabour。Nevertheless，Iearnestlyhopethatyoumaybeinducedtotreatmoralsinthesameenlargedyetcarefulmanner，asyouhaveanimism。I
fancyfromthelastchapterthatyouhavethoughtofthis。Nomancoulddotheworksowellasyou，andthesubjectassuredlyisamostimportantandinterestingone。Youmustnowpossessreferenceswhichwouldguideyoutoasoundestimationofthemoralsofsavages;andhowwriterslikeWallace，Lubbock，etc。，etc。，dodifferonthishead。Forgivemefortroublingyou，andbelieveme，withmuchrespect，Yoursverysincerely，CH。DARWIN。
1872。
[Atthebeginningoftheyearthesixtheditionofthe’Origin，’whichhadbeenbeguninJune，1871，wasnearlycompleted。ThelastsheetwasrevisedonJanuary10，1872，andthebookwaspublishedinthecourseofthemonth。
Thisvolumediffersfromthepreviousonesinappearanceandsize——itconsistsof458pagesinsteadof596pagesandisafewounceslighter;itisprintedonbadpaper，insmalltype，andwiththelinesunpleasantlyclosetogether。Ithad，however，oneadvantageoverpreviouseditions，namelythatitwasissuedatalowerprice。Itistoberegrettedthatthisthefinaleditionofthe’Origin’shouldhaveappearedinsounattractiveaform;aformwhichhasdoubtlesskeptoffmanyreadersfromthebook。
Thediscussionsuggestedbythe’GenesisofSpecies’wasperhapsthemostimportantadditiontothebook。Theobjectionthatincipientstructurescannotbeofusewasdealtwithinsomedetail，becauseitseemedtotheauthorthatthiswasthepointinMr。Mivart’sbookwhichhasstruckmostreadersinEngland。
Itisastrikingproofofhowwideandgeneralhadbecometheacceptanceofhisviewsthatmyfatherfounditnecessarytoinsert（sixthedition，page424），thesentence:"Asarecordofaformerstateofthings，Ihaveretainedintheforegoingparagraphsandalsoelsewhere，severalsentenceswhichimplythatnaturalistsbelieveintheseparatecreationofeachspecies;andIhavebeenmuchcensuredforhavingthusexpressedmyself。
Butundoubtedlythiswasthegeneralbeliefwhenthefirsteditionofthepresentworkappeared……Nowthingsarewhollychanged，andalmosteverynaturalistadmitsthegreatprincipleofevolution。"
Asmallcorrectionintroducedintothissixtheditionisconnectedwithoneofhisminorpapers:"NoteonthehabitsofthePampasWoodpecker。"
（Zoolog。Soc。Proc。1870。）Inthefiftheditionofthe’Origin，’page220，hewrote:——
"YetasIcanassertnotonlyfrommyownobservation，butfromthatoftheaccurateAzara，it[thegroundwoodpecker]neverclimbsatree。"ThepaperinquestionwasareplytoMr。Hudson’sremarksonthewoodpeckerinapreviousnumberofthesamejournal。Thelastsentenceofmyfather’spaperisworthquotingforitstemperatetone:"Finally，ItrustthatMr。
HudsonismistakenwhenhesaysthatanyoneacquaintedwiththehabitsofthisbirdmightbeinducedtobelievethatI’hadpurposelywrestedthetruth’inordertoprovemytheory。Heexoneratesmefromthischarge;butIshouldbeloathtothinkthattherearemanynaturalistswho，withoutanyevidence，wouldaccuseafellow—workeroftellingadeliberatefalsehoodtoprovehistheory。"Inthesixthedition，page142，thepassageruns"incertainlargedistrictsitdoesnotclimbtrees。"AndhegoesontogiveMr。Hudson’sstatementthatinotherregionsitdoesfrequenttrees。
Oneoftheadditionsinthesixthedition（page149），wasareferencetoMr。A。Hyatt’sandProfessorCope’stheoryof"acceleration。"Withregardtothishewrote（October10，1872）incharacteristicwordstoMr。Hyatt:——