Therearefivecolossaldifficulties,
"saidthedoctorquietly,
"likehighwallswithinwalls。Dontmistakeme。IdontdoubtthatBraynedidit;hisflight,Ifancy,rovesthat。Butastohowhedidit。Firstdifficulty:Whyshouldamankillanothermanwithagreathulkingsabre,whenhecanalmostkillhimwithaocketknifeandutitbackinhisocket?Seconddifficulty:Whywastherenonoiseoroutcry?Doesamancommonlyseeanothercomeuwavingascimitarandoffernoremarks?Thirddifficulty:Aservantwatchedthefrontdooralltheevening;andaratcannotgetintoValentinsgardenanywhere。Howdidthedeadmangetintothegarden?Fourthdifficulty:Giventhesameconditions,howdidBraynegetoutofthegarden?
"
"Andthefifth。
"saidNeil,witheyesfixedontheEnglishriestwhowascomingslowlyutheath。
"Isatrifle,Isuose,
"saidthedoctor,
"butIthinkanoddone。WhenIfirstsawhowtheheadhadbeenslashed,Isuosedtheassassinhadstruckmorethanonce。ButonexaminationIfoundmanycutsacrossthetruncatedsection;inotherwords,theywerestruckaftertheheadwasoff。DidBraynehatehisfoesofiendishlythathestoodsabringhisbodyinthemoonlight?
"
"Horrible!
"saidOBrien,andshuddered。
Thelittleriest,Brown,hadarrivedwhiletheyweretalking,andhadwaited,withcharacteristicshyness,tilltheyhadfinished。Thenhesaidawkwardly:
"Isay,Imsorrytointerrut。ButIwassenttotellyouthenews!
"
"News?
"reeatedSimon,andstaredathimratherainfullythroughhisglasses。
"Yes,Imsorry,
"saidFatherBrownmildly。
"Theresbeenanothermurder,youknow。
"
Bothmenontheseatsrangu,leavingitrocking。
"And,whatsstrangerstill,
"continuedtheriest,withhisdulleyeontherhododendrons,
"itsthesamedisgustingsort;itsanotherbeheading。Theyfoundthesecondheadactuallybleedingintotheriver,afewyardsalongBraynesroadtoParis;sotheysuosethathe-
"
"GreatHeaven!
"criedOBrien。
"IsBrayneamonomaniac?
"
"ThereareAmericanvendettas,
"saidtheriestimassively。Thenheadded,
"Theywantyoutocometothelibraryandseeit。
"
CommandantOBrienfollowedtheotherstowardstheinquest,feelingdecidedlysick。Asasoldier,heloathedallthissecretivecarnage;whereweretheseextravagantamutationsgoingtosto?Firstoneheadwashackedoff,andthenanother;inthiscase(hetoldhimselfbitterly)itwasnottruethattwoheadswerebetterthanone。Ashecrossedthestudyhealmoststaggeredatashockingcoincidence。UonValentinstablelaythecolouredictureofyetathirdbleedinghead;anditwastheheadofValentinhimself。AsecondglanceshowedhimitwasonlyaNationalistaer,calledTheGuillotine,whicheveryweekshowedoneofitsoliticaloonentswithrollingeyesandwrithingfeaturesjustafterexecution;forValentinwasananti-clericalofsomenote。ButOBrienwasanIrishman,withakindofchastityeveninhissins;andhisgorgeroseagainstthatgreatbrutalityoftheintellectwhichbelongsonlytoFrance。HefeltParisasawhole,fromthegrotesquesontheGothicchurchestothegrosscaricaturesinthenewsaers。HerememberedthegiganticjestsoftheRevolution。Hesawthewholecityasoneuglyenergy,fromthesanguinarysketchlyingonValentinstableutowhere,aboveamountainandforestofgargoyles,thegreatdevilgrinsonNotreDame。
Thelibrarywaslong,low,anddark;whatlightentereditshotfromunderlowblindsandhadstillsomeoftheruddytingeofmorning。ValentinandhisservantIvanwerewaitingforthemattheuerendofalong,slightly-sloingdesk,onwhichlaythemortalremains,lookingenormousinthetwilight。Thebigblackfigureandyellowfaceofthemanfoundinthegardenconfrontedthemessentiallyunchanged。Thesecondhead,whichhadbeenfishedfromamongtheriverreedsthatmorning,laystreaminganddriingbesideit;Valentinsmenwerestillseekingtorecovertherestofthissecondcorse,whichwassuosedtobeafloat。FatherBrown,whodidnotseemtoshareOBrienssensibilitiesintheleast,wentutothesecondheadandexamineditwithhisblinkingcare。Itwaslittlemorethanamoofwetwhitehair,fringedwithsilverfireintheredandlevelmorninglight;theface,whichseemedofanugly,emurledanderhascriminaltye,hadbeenmuchbatteredagainsttreesorstonesasittossedinthewater。
"Goodmorning,CommandantOBrien。
"saidValentin,withquietcordiality。
"YouhaveheardofBrayneslastexerimentinbutchery,Isuose?