Wecannot，however，failtorecognizetheevidenceoffacts。Wecanunderstandhowmenwereeverywhereimpelledtoraisemoundsabovethebodiesoftheirancestors，toperpetuatetheirmemoryortoenclosetheirmortalremainsbetweenflatstonestosavethemfrombeingcrushedbytheweightofearthabovethem。Wemayeven，bystrainingapoint，admittheideathatalargecistdevelopedintoadolmen，butwhenindistrictsseparatedbyenormousdistancesweseemonumentswiththewallpiercedwithacircularopeningorcombininganinteriorcryptwithanexternalmoundanddolmen，itisimpossibletolookuponthesecloseresemblancesastheresultofanaccidentalcoincidence，andequallyimpossibletofailtoconcludethatthemenwhosefuneralriteswereremarkableforsuchclosesimilaritybelongedtothesamerace。
Whatthenwasthisrace？ArethesemonumentswitnessesofthegreatAryanimmigrationwhichwasforsolongsupposedtohavespreadfromIndiaoverthecontinentsofAsiaandEurope，andofwhichtheIndo-Europeanlanguagesweresaidtopreservethememory？Orisitreallythefactthatarelationshipoflanguagedoesnotimplyarelationshipofrace？WerethebuildersofthedolmensCeltsorGauls，LiguresorCymri？wasHenryMartinrightinascribingtotheCimeriiofScandinaviatheerectionintheBronzeageofthemegalithsofIreland？WasittheTuranians，withtheirworshipofancestor’s，theirrespectforthetombsoftheirforefather’s，andtheirdesiretoperpetuatetheirmemorytoeternity，whosetupthedolmensofBrittany？WasitnotperhapsrathertheIberians，whosedescendantsstillpeopleSpainandthenorthofAfrica？AccordingtoMaury，thedistributionofthemegalithicmonumentsofEuropemarksthelastrefugeofvanquishedNeolithicraces，fleeingbeforetheirconquerors。Allthesehypothesesareplausible，allcanbedefendedbyarguments，theweightofwhichitisimpossibletodeny，butnonearecapableofconclusiveproof，nonecanfinallyconvincethestudent。[168]
AnoldWelshpoet，referringtothelongbarrowsofhisnativeland，saysthattheyarealtogetherinexplicable，andthatitisimpossibletodecidewhosetthemuporwhoisburiedbeneaththem。Andsurelythisancientbard[169]isrightevennow。Vainlydowequestionthesesilentwitnessesoftheremotepast。Theygiveusnoanswer，andwecanbutrepeatherewhatwesaidatthebeginningofthisinquiry：
Humanscienceispowerlesstolifttheveilbidingtheearlyhistoryofhumanity。Williteverbeso？Orwillthedayyetdawnwhentheveilwillberentasunderatlast？Timealonecansolvethisquestion，whichisoneofthosesecretsofthefutureasdifficulttofathomasthoseofthepast。
Industry，Commerce，andSocialOrganization；Fights，WoundsandTrepanation。