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1、Enigma-RobertHarrisAuthor'sNoteThisnovelissetagainstthebackgroundofanactualhistoricalevent.TheGermannavalsignalsquotedinthetextareallauthentic.Thecharacters,however,areentirelyfictional.'ItlooksasifBletchleyParkisthesinglegreatestachievementofBritainduring1939-45,pe
2、rhapsduringthiscenturyasawhole.'GeorgeSteiner'Amathematicalproofshouldresembleasimpleandclear-cutconstellation,notascatteredclusterintheMilkyWay.Achessproblemalsohasunexpectedness,andacertaineconomy;itisessentialthatthemovesshouldbesurprising,andthateverypieceontheb
3、oardshouldplayitspart.'G.H.Hardy,AMathematician'sApologyONEWHISPERSWHISPERS:thesoundsmadebyanenemywirelesstransmitterimmediatelybeforeitbeginstobroadcastacodedmessage.ALexiconofCryptography('MostSecret',BletchleyPark,1943)1CAMBRIDGEINTHEfourthwinterofthewar:aghostto
4、wn.AceaselessSiberianwindwithnothingtobluntitsedgeforathousandmileswhippedofftheNorthSeaandsweptlowacrosstheFens.Itrattledthesignstotheair-raidsheltersinTrinityNewCourtandbatteredontheboarded-upwindowsofKing'sCollegeChapel.Itprowledthroughthequadranglesandstaircases
5、,confiningthefewdonsandstudentsstillinresidencetotheirrooms.Bymid-afternoonthenarrowcobbledstreetsweredeserted.Bynightfall,withnotalighttobeseen,theuniversitywasreturnedtoadarknessithadn'tknownsincetheMiddleAges.AprocessionofmonksshufflingoverMagdaleneBridgeontheirw
6、aytoVesperswouldscarcelyhaveseemedoutofplace.Inthewartimeblackoutthecenturieshaddissolved.ItwastothisbleakspotintheflatlandsofeasternEnglandthattherecame,inthemiddleofFebruary1943,ayoungmathematiciannamedThomasJericho.Theauthoritiesofhiscollege,King's,weregivenlesst
7、hanaday'snoticeofhisarrival-scarcelyenoughtimetoreopenhisrooms,putsheetsonhisbed,andhavemorethanthreeyears'worthofdustsweptfromhisshelvesandcarpets.Andtheywouldnothavegonetoeventhatmuchtrouble,itbeingwartimeandservantssoscarce-hadnottheProvosthimselfbeentelephonedat
8、theMaster'sLodgebyanobscurebutveryseniorofficialofHisMajesty'sForeignOffice,witharequestthat'MrJerichobelookedafteruntilheiswellenoughtore
