“Now,inEnglish,theletterwhichmostfrequentlyoccursise。
Afterwards,successionrunsthus:_aoidhnrstuycfglmwbkpqxz_。_E_predominatessoremarkablythatanindividualsentenceofanylengthisrarelyseen,inwhichitisnottheprevailingcharacter。
“Here,then,weleave,intheverybeginning,thegroundworkforsomethingmorethanamereguess。Thegeneralusewhichmaybemadeofthetableisobvious-but,inthisparticularcipher,weshallonlyverypartiallyrequireitsaid。Asourpredominantcharacteris8,wewillcommencebyassumingitasthe_e_ofthenaturalalphabet。Toverifythesupposition,letusobserveifthe8beseenoftenincouples-for_e_isdoubledwithgreatfrequencyinEnglish-insuchwords,forexample,as’meet,’’。fleet,’’speed,’’seen,’
been,’’agree,’&c。Inthepresentinstanceweseeitdoublednolessthanfivetimes,althoughthecryptographisbrief。
“Letusassume8,then,as_e_。Now,ofall_words_inthelanguage,’the’ismostusual;letussee,therefore,whethertherearenotrepetitionsofanythreecharacters,inthesameorderofcollocation,thelastofthembeing8。Ifwediscoverrepetitionsofsuchletters,soarranged,theywillmostprobablyrepresenttheword’the。’Uponinspection,wefindnolessthansevensucharrangements,thecharactersbeing;48。Wemay,therefore,assumethat;represents_t_,4represents_h_,and8represents_e_-thelastbeingnowwellconfirmed。Thusagreatstephasbeentaken。