Researchwasnowredoubled，and，asaresult，humanskullsandcompleteskeletonsofvarioustypesbegantobediscoveredintheancientdepositsofmanyotherpartsoftheworld，andespeciallyinFrance，Belgium，Germany，theCaucasus，Africa，andNorthandSouthAmerica。
Butsoonbegantoemergefromallthesediscoveriesafactofenormousimportance。TheskullsandbonesfoundatCroMagnon，Solutre，Furfooz，Grenelle，andelsewhere，werecompared，anditwasthusmadecertainthatvariousraceshadalreadyappearedandlivedinvariousgradesofcivilization，eveninthoseexceedinglyremoteepochs；thateventhentherewerevariousstrataofhumanityrangingfromracesofaverylowtothoseofaveryhightype；andthatuponanytheory——certainlyuponthetheoryoftheoriginofmankindfromasinglepair——twothingswereevident：first，thatlong，slowprocessesduringvastperiodsoftimemusthavebeenrequiredforthedifferentiationoftheseraces，andfortheevolutionofmanuptothepointwherethebetterspecimensshowhim，certainlyintheearlyQuaternaryandperhapsintheTertiaryperiod；and，secondly，thattherehadbeenfromthefirstappearanceofman，ofwhichwehaveanytraces，anUPWARDtendency。[191]
[191]ForWesley’sstatementoftheamazingconsequencesoftheentranceofdeathintotheworldbysin，seecitationsinhissermononTheFallofManinthechapteronGeology。ForBoucherdePerthes，seehisLifebyLedieu，especiallychaptersvandxix；alsolettersintheappendix；alsoLesAntiquitiesCeltiquesetAntediluviennes，ascitedinpreviouschaptersofthiswork。
ForanaccountoftheNeanderthalmanandotherremainsmentioned，seeQuatrefages，HumanSpecies，chap。xxvi；alsoMortillet，LePrehistorique，Paris，1885，pp。232etseq。；alsootherwriterscitedinthischapter。Fortheotherdiscoveriesmentioned，seethesamesources。ForanengravingoftheskullandtherestoredhumanfaceoftheNeanderthalman，seeReinach，AntiquitiesNationales，etc。，vol。i，p。138。Forthevastregionsoverwhichthatearlyracespread，seeQuatrefagesasabove，p。307。Seealsothesameauthor，HistoireGeneraledesRacesHumaines，intheBibliothequeEthnologique，Paris，1887，p。
4。Inthevastmassofliteraturebearingonthissubject，seeQuatrefages，Dupont，Reinach，Joly，Mortillet，Tylor，andLubbock，inworkscitedthroughthesechapters。