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the darrow enigma(达罗之迷)-第37部分

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to myself; have suggested to your father's assassin the course he pursued。 

I concluded to go to the library and ask for a list of the names of persons 

who had taken out this book for a few months prior to your father's death。 

I was fully aware that the chance of my learning anything in this way was 

very slight; In the first place; I reasoned that it was not especially likely 

your father's murderer had read 'The Sign of the Four;' and; in the second 

place; even if he had; what assurance had I that he had read this particular 

copy   of   it?   Notwithstanding   this;   however;   I   felt   impelled   to   give   my 

synthetical      theory   a   fair  experimental      trial。  I   was    informed     by   the 

Library attendants that the book had been much read; and given the list of 

some   twenty   names   of   persons   who   had   borrowed   the   book   during   the 

time I had specified。        With these twenty…odd names before me; I sat down 

to think what my next step should be。              I went carefully over this chain of 

reasoning      link  by   link。   'I  wish   to  find   a   certain  murderer;     and   have 



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adopted   this   method   in   the   hope   that   it   may   help   me。     If   I   derive   any 

assistance at all from it; it will be because my man has read this particular 

copy of this work; therefore; I may as well assume at the start that among 

these twenty…odd names is that of the man I want。                  Is there any possibility 

of this crime having been committed by a woman?' was my next question; 

and my answer was; 'Yes; a possibility; but it is so decidedly improbable 

that I may count it out for the time being。'             Accordingly; I set aside all the 

female      names;    which     cut   my    list  down    to   eighteen。     Several     of   the 

applicants      had   only    signed    the  initials   of  their   given    names;     and   the 

attendant;     copying      them    from    the  slips;   had   done    likewise;    so   I  was 

obliged   to   go   to   the   registration   clerk to   determine   this   question   of   sex; 

and; while there; I also ascertained the age of each applicant … that is; of all 

but   two。     The   registrar   could   give   me   no   information   regarding   J。   Z。 

Weltz; or B。 W。 Rizzi。          When I told him that one of the clerks had copied 

the names for me from application slips; he informed me that if I would go 

back to her I would undoubtedly find she had taken the two last…mentioned 

names   from   the   green   slips   used   in   applying   for   books   for   hall   use;   as 

neither J。 Z。 Weltz nor B。 W。 Rizzi was a card…holder。 

     〃I decided to let these two names rest a while; and to give my attention 

to   the   others。    After     careful    deliberation     I  felt  reasonably      sure   your 

father's    assassin    could    not   fail  to  be   a  man    of   mature    judgment      and 

extraordinary cunning; probably a   man past   middle   life …   at all   events;  I 

could safely say he was over twenty…one years of age。                      Proceeding upon 

this   assumption   my   list   was   reduced   to   ten   names。        But   how   should   I 

further continue this process of exclusion?                This was the question which 

now confronted me。           I could think of but one way; apart from personally 

making the gentlemen's acquaintance; which I did not then wish to do; and 

that   was   to   ascertain   what   other   books   they   had   borrowed   immediately 

before   and   after   they   had   read   'The   Sign   of   the   Four。'     This   was   the 

course I determined to pursue。 

     〃If   you   ask   me   why   I   so   persistently   followed   an   investigation;   a 

successful outcome of which anyone must recognise would be little short 

of   miraculous;   I   can   only   say   that   I   felt   impelled   to   do   so。   Perhaps   the 

impulse was due to my habit of testing patiently and thoroughly each new 



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theory     which    impresses     me   as  having    any   degree    of   probability;   and 

perhaps it was due to something else … Cleopatra; perhaps; eh; Doctor? … I 

don't    know。      I   determined;      however;      to  thoroughly      satisfy   myself 

regarding these ten men。          I made a careful list; with the assistance of an 

attendant;   of   ten   books   taken   by  each   man;   five   taken   just   prior   to   'The 

Sign     of  the   Four;'  and   the   other   five   just  following     it。  I  made     no 

deductions   until   the   list   was   completed;   although   I   began   to   see   certain 

things   of   interest   as   we   worked   upon   it。  At   length   the   whole   hundred 

titles were spread before me; and I sat down to see what I could make of 

them。     I   purposely     reserved    consideration     of   the  books    borrowed      by 

Weltz and Rizzi until the last; because I had been able to learn nothing of 

them; and considered; therefore; that they were the most difficult persons 

in the list about whom to satisfy myself。            I found the other eight exhibited 

no system in their reading。          One had read … I think I can remember the 

books in the order in which they were borrowed …                  'Thelma;' 'Under Two 

Flags;'   'David   Copperfield;'   'The   Story   of   an African   Farm;'   'A  Study   in 

Scarlet;'    'The   Sign   of   the  Four;'   'The   Prisoner    of  Zenda;'    'The   Dolly 

Dialogues;'   'The   Yellow   Aster;'   'The   Superfluous   Woman;'   and   'Ideala。' 

This is a fair sample of the other seven。             Not so; however; with Messrs。 

Weltz and Rizzi。 The reading of these men at once impressed me as having 

a purpose behind it。 

     〃I will read you a list of the books taken by Weltz and Rizzi; just to see 

what you will make out of it: 

                                    WELTZ         RIZZI 

       I。〃Lecons   de   Toxicologic;〃        1。〃Traite   de   Toxicologic;〃         par   M。 

Orifia。       par C。 P。 Galtier。 

       2。〃The Poisons of Asps and            2。〃The Poisons of Asps and               Other 

Stories;〃     by    Florence      Other      Stories;〃   by    Florence           Marryat。 

Marryat。 

       3。〃A Practical Essay on3。〃A Practical Essay on                  Cancer;〃 by C。 T。 

Johnson。        Cancer;〃 by C。 T。 Johnson。 

     4。〃The   Sharper   Detected4。〃The   Sharper   Detected               and   Exposed;〃 

by R。 Houdin。        and Exposed;〃 by R。 Houdin。 

     5。〃The   Sign   of   the   Four;〃      5。〃The   Sign   of   the   Four;〃         by  A。 



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Conan Doyle。           by A。 Conan Doyle。 

     6。〃Cancer;       a   New      Method       of         6。〃Legal      Chemistry:       A 

Treatment;〃      by   W。   H。      Guide     to  the   Detection    of       Broadbent。 

Poisons;      Examinations       of             Stains;    etc。;   as   Applied      to=20 

Chemical Jurisprudence。〃               From the French of A。 Naquet=20                  by 

J。 P。 Battershall; Nat。Sc。D。 

     7。〃Reports of Trials for            7。〃Traite Pratique des         =20 Murder by 

Poisoning;〃Maladies   Cancerences;〃   by   G。          L。   Browne   and   C。      par   H。 

Lebert。 G。Stewart。       =20 

     8。〃A Practical Treatise on         8。〃A Practical Treatise on Poisons;〃 by 0。 

H。 Costill。         Poisons;〃 by 0。 H。 Costill。 

     9。〃Poisons;     Their    Effects         9。〃A     Treatise   on   Poisons     in  and 

Detection;〃      by  Alexander          Relation     to  Medical=20       Wynter    Blyth。 

Jurisprudence;  Physiology;              and   the   Practice of   Physic;〃=20          by 

R。 Christison;M。D。; F。R。S。E。 

     10。〃Poisons;       Their    Effects        10。〃Poisons;       Their    Effects     and 

Detection;〃 by Alexander               and Detection;〃 by Alexander =20 Wynter 

Blyth。      Wynter Blyth。 

       〃There; do you wonder that the perusal of that list excited me? Come; 

now; before I go any further; tell me what you make of it; Doc;〃 and he 

passed it to me。 

     〃There   seems   to   me   to   be   a   singular   unanimity   of   purpose   existing 

between these two men;〃 I said; 〃not only as regards the subject…matter of 

their reading; but in no less than six cases they have both perused the same 

volume。      This never happened by chance。 Clearly; they are acquaintances; 

and   are   working   together   toward   some   common   end。        I   should   think   it 

very l
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