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<h1> The Sign of the Four</h1>
<h2 class="no-break">by Arthur Conan Doyle</h2>
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<h2>Contents</h2>
<table summary="" style="margin-left: auto; margin-right: auto">
<tr>
<td><SPAN href="#chap01">Chapter I. The Science of Deduction</SPAN></td>
</tr>
<tr>
<td><SPAN href="#chap02">Chapter II. The Statement of the Case</SPAN></td>
</tr>
<tr>
<td><SPAN href="#chap03">Chapter III. In Quest of a Solution</SPAN></td>
</tr>
<tr>
<td><SPAN href="#chap04">Chapter IV. The Story of the Bald-Headed Man</SPAN></td>
</tr>
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<td><SPAN href="#chap05">Chapter V. The Tragedy of Pondicherry Lodge</SPAN></td>
</tr>
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<td><SPAN href="#chap06">Chapter VI. Sherlock Holmes Gives a Demonstration</SPAN></td>
</tr>
<tr>
<td><SPAN href="#chap07">Chapter VII. The Episode of the Barrel</SPAN></td>
</tr>
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<td><SPAN href="#chap08">Chapter VIII. The Baker Street Irregulars</SPAN></td>
</tr>
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<td><SPAN href="#chap09">Chapter IX. A Break in the Chain</SPAN></td>
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<td><SPAN href="#chap10">Chapter X. The End of the Islander</SPAN></td>
</tr>
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<td><SPAN href="#chap11">Chapter XI. The Great Agra Treasure</SPAN></td>
</tr>
<tr>
<td><SPAN href="#chap12">Chapter XII. The Strange Story of Jonathan Small</SPAN></td>
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</table>
<h2><SPAN name="chap01"></SPAN>Chapter I<br/> The Science of Deduction</h2>
<p>Sherlock Holmes took his bottle from the corner of the mantel-piece and his
hypodermic syringe from its neat morocco case. With his long, white, nervous
fingers he adjusted the delicate needle, and rolled back his left shirt-cuff.
For some little time his eyes rested thoughtfully upon the sinewy forearm and
wrist all dotted and scarred with innumerable puncture-marks. Finally he thrust
the sharp point home, pressed down the tiny piston, and sank back into the
velvet-lined arm-chair with a long sigh of satisfaction.</p>
<p>Three times a day for many months I had witnessed this performance, but custom
had not reconciled my mind to it. On the contrary, from day to day I had become
more irritable at the sight, and my conscience swelled nightly within me at the
thought that I had lacked the courage to protest. Again and again I had
registered a vow that I should deliver my soul upon the subject, but there was
that in the cool, nonchalant air of my companion which made him the last man
with whom one would care to take anything approaching to a liberty. His great
powers, his masterly manner, and the experience which I had had of his many
extraordinary qualities, all made me diffident and backward in crossing him.</p>
<p>Yet upon that afternoon, whether it was the Beaune which I had taken with my
lunch, or the additional exasperation produced by the extreme deliberation of
his manner, I suddenly felt that I could hold out no longer.</p>
<p>“Which is it to-day?” I asked,—“morphine or
cocaine?”</p>
<p>He raised his eyes languidly from the old black-letter volume which he had
opened. “It is cocaine,” he said,—“a seven-per-cent.
solution. Would you care to try it?”</p>
<p>“No, indeed,” I answered, brusquely. “My constitution has not
got over the Afghan campaign yet. I cannot afford to throw any extra strain
upon it.”</p>
<p>He smiled at my vehemence. “Perhaps you are right, Watson,” he
said. “I suppose that its influence is physically a bad one. I find it,
however, so transcendently stimulating and clarifying to the mind that its
secondary action is a matter of small moment.”</p>
<p>“But consider!” I said, earnestly. “Count the cost! Your
brain may, as you say, be roused and excited, but it is a pathological and
morbid process, which involves increased tissue-change and may at last leave a
permanent weakness. You know, too, what a black reaction comes upon you. Surely
the game is hardly worth the candle. Why should you, for a mere passing
pleasure, risk the loss of those great powers with which you have been endowed?
Remember that I speak not only as one comrade to another, but as a medical man
to one for whose constitution he is to some extent answerable.”</p>
<p>He did not seem offended. On the contrary, he put his finger-tips together and
leaned his elbows on the arms of his chair, like one who has a relish for
conversation.</p>
<p>“My mind,” he said, “rebels at stagnation. Give me problems,
give me work, give me the most abstruse cryptogram or the most intricate
analysis, and I am in my own proper atmosphere. I can dispense then with
artificial stimulants. But I abhor the dull routine of existence. I crave for
mental exaltation. That is why I have chosen my own particular
profession,—or rather created it, for I am the only one in the
world.”</p>
<p>“The only unofficial detective?” I said, raising my eyebrows.</p>
<p>“The only unofficial consulting detective,” he answered. “I
am the last and highest court of appeal in detection. When Gregson or Lestrade
or Athelney Jones are out of their depths—which, by the way, is their
normal state—the matter is laid before me. I examine the data, as an
expert, and pronounce a specialist’s opinion. I claim no credit in such
cases. My name figures in no newspaper. The work itself, the pleasure of
finding a field for my peculiar powers, is my highest reward. But you have
yourself had some experience of my methods of work in the Jefferson Hope
case.”</p>
<p>“Yes, indeed,” said I, cordially. “I was never so struck by
anything in my life. I even embodied it in a small brochure with the somewhat
fantastic title of ‘A Study in Scarlet.’”</p>
<p>He shook his head sadly. “I glanced over it,” said he.
“Honestly, I cannot congratulate you upon it. Detection is, or ought to
be, an exact science, and should be treated in the same cold and unemotional
manner. You have attempted to tinge it with romanticism, which produces much
the same effect as if you worked a love-story or an elopement into the fifth
proposition of Euclid.”</p>
<p>“But the romance was there,” I remonstrated. “I could not
tamper with the facts.”</p>
<p>“Some facts should be suppressed, or at least a just sense of proportion
should be observed in treating them. The only point in the case which deserved
mention was the curious analytical reasoning from effects to causes by which I
succeeded in unraveling it.”</p>
<p>I was annoyed at this criticism of a work which had been specially designed to
please him. I confess, too, that I was irritated by the egotism which seemed to
demand that every line of my pamphlet should be devoted to his own special
doings. More than once during the years that I had lived with him in Baker
Street I had observed that a small vanity underlay my companion’s quiet
and didactic manner. I made no remark, however, but sat nursing my wounded leg.
I had a Jezail bullet through it some time before, and, though it did not
prevent me from walking, it ached wearily at every change of the weather.</p>
<p>“My practice has extended recently to the Continent,” said Holmes,
after a while, filling up his old brier-root pipe. “I was consulted last
week by François Le Villard, who, as you probably know, has come rather to the
front lately in the French detective service. He has all the Celtic power of
quick intuition, but he is deficient in the wide range of exact knowledge which
is essential to the higher developments of his art. The case was concerned with
a will, and possessed some features of interest. I was able to refer him to two
parallel cases, the one at Riga in 1857, and the other at St. Louis in 1871,
which have suggested to him the true solution. Here is the letter which I had
this morning acknowledging my assistance.” He tossed over, as he spoke, a
crumpled sheet of foreign notepaper. I glanced my eyes down it, catching a
profusion of notes of admiration, with stray “magnifiques,”
“coup-de-maîtres,” and “tours-de-force,” all testifying
to the ardent admiration of the Frenchman.</p>
<p>“He speaks as a pupil to his master,” said I.</p>
<p>“Oh, he rates my assistance too highly,” said Sherlock Holmes,
lightly. “He has considerable gifts himself. He possesses two out of the
three qualities necessary for the ideal detective. He has the power of
observation and that of deduction. He is only wanting in knowledge; and that
may come in time. He is now translating my small works into French.”</p>
<p>“Your works?”</p>
<p>“Oh, didn’t you know?” he cried, laughing. “Yes, I have
been guilty of several monographs. They are all upon technical subjects. Here,
for example, is one ‘Upon the Distinction between the Ashes of the
Various Tobaccoes.’ In it I enumerate a hundred and forty forms of
cigar-, cigarette-, and pipe-tobacco, with coloured plates illustrating the
difference in the ash. It is a point which is continually turning up in
criminal trials, and which is sometimes of supreme importance as a clue. If you
can say definitely, for example, that some murder has been done by a man who
was smoking an Indian lunkah, it obviously narrows your field of search. To the
trained eye there is as much difference between the black ash of a Trichinopoly
and the white fluff of bird’s-eye as there is between a cabbage and a
potato.”</p>
<p>“You have an extraordinary genius for minutiæ,” I remarked.</p>
<p>“I appreciate their importance. Here is my monograph upon the tracing of
footsteps, with some remarks upon the uses of plaster of Paris as a preserver
of impresses. Here, too, is a curious little work upon the influence of a trade
upon the form of the hand, with lithotypes of the hands of slaters, sailors,
corkcutters, compositors, weavers, and diamond-polishers. That is a matter of
great practical interest to the scientific detective,—especially in cases
of unclaimed bodies, or in discovering the antecedents of criminals. But I
weary you with my hobby.”</p>
<p>“Not at all,” I answered, earnestly. “It is of the greatest
interest to me, especially since I have had the opportunity of observing your
practical application of it. But you spoke just now of observation and
deduction. Surely the one to some extent implies the other.”</p>
<p>“Why, hardly,” he answered, leaning back luxuriously in his
arm-chair, and sending up thick blue wreaths from his pipe. “For example,
observation shows me that you have been to the Wigmore Street Post-Office this
morning, but deduction lets me know that when there you dispatched a
telegram.”</p>
<p>“Right!” said I. “Right on both points! But I confess that I
don’t see how you arrived at it. It was a sudden impulse upon my part,
and I have mentioned it to no one.”</p>
<p>“It is simplicity itself,” he remarked, chuckling at my
surprise,—“so absurdly simple that an explanation is superfluous;
and yet it may serve to define the limits of observation and of deduction.
Observation tells me that you have a little reddish mould adhering to your
instep. Just opposite the Wigmore Street Office they have taken up the pavement
and thrown up some earth which lies in such a way that it is difficult to avoid
treading in it in entering. The earth is of this peculiar reddish tint which is
found, as far as I know, nowhere else in the neighbourhood. So much is
observation. The rest is deduction.”</p>
<p>“How, then, did you deduce the telegram?”</p>
<p>“Why, of course I knew that you had not written a letter, since I sat
opposite to you all morning. I see also in your open desk there that you have a
sheet of stamps and a thick bundle of post-cards. What could you go into the
post-office for, then, but to send a wire? Eliminate all other factors, and the
one which remains must be the truth.”</p>
<p>“In this case it certainly is so,” I replied, after a little
thought. “The thing, however, is, as you say, of the simplest. Would you
think me impertinent if I were to put your theories to a more severe
test?”</p>
<p>“On the contrary,” he answered, “it would prevent me from
taking a second dose of cocaine. I should be delighted to look into any problem
which you might submit to me.”</p>
<p>“I have heard you say that it is difficult for a man to have any object
in daily use without leaving the impress of his individuality upon it in such a
way that a trained observer might read it. Now, I have here a watch which has
recently come into my possession. Would you have the kindness to let me have an
opinion upon the character or habits of the late owner?”</p>
<p>I handed him over the watch with some slight feeling of amusement in my heart,
for the test was, as I thought, an impossible one, and I intended it as a
lesson against the somewhat dogmatic tone which he occasionally assumed. He
balanced the watch in his hand, gazed hard at the dial, opened the back, and
examined the works, first with his naked eyes and then with a powerful convex
lens. I could hardly keep from smiling at his crestfallen face when he finally
snapped the case to and handed it back.</p>
<p>“There are hardly any data,” he remarked. “The watch has been
recently cleaned, which robs me of my most suggestive facts.”</p>
<p>“You are right,” I answered. “It was cleaned before being
sent to me.” In my heart I accused my companion of putting forward a most
lame and impotent excuse to cover his failure. What data could he expect from
an uncleaned watch?</p>
<p>“Though unsatisfactory, my research has not been entirely barren,”
he observed, staring up at the ceiling with dreamy, lack-lustre eyes.
“Subject to your correction, I should judge that the watch belonged to
your elder brother, who inherited it from your father.”</p>
<p>“That you gather, no doubt, from the H. W. upon the back?”</p>
<p>“Quite so. The W. suggests your own name. The date of the watch is nearly
fifty years back, and the initials are as old as the watch: so it was made for
the last generation. Jewelry usually descends to the eldest son, and he is most
likely to have the same name as the father. Your father has, if I remember
right, been dead many years. It has, therefore, been in the hands of your
eldest brother.”</p>
<p>“Right, so far,” said I. “Anything else?”</p>
<p>“He was a man of untidy habits,—very untidy and careless. He was
left with good prospects, but he threw away his chances, lived for some time in
poverty with occasional short intervals of prosperity, and finally, taking to
drink, he died. That is all I can gather.”</p>
<p>I sprang from my chair and limped impatiently about the room with considerable
bitterness in my heart.</p>
<p>“This is unworthy of you, Holmes,” I said. “I could not have
believed that you would have descended to this. You have made inquires into the
history of my unhappy brother, and you now pretend to deduce this knowledge in
some fanciful way. You cannot expect me to believe that you have read all this
from his old watch! It is unkind, and, to speak plainly, has a touch of
charlatanism in it.”</p>
<p>“My dear doctor,” said he, kindly, “pray accept my apologies.
Viewing the matter as an abstract problem, I had forgotten how personal and
painful a thing it might be to you. I assure you, however, that I never even
knew that you had a brother until you handed me the watch.”</p>
<p>“Then how in the name of all that is wonderful did you get these facts?
They are absolutely correct in every particular.”</p>
<p>“Ah, that is good luck. I could only say what was the balance of
probability. I did not at all expect to be so accurate.”</p>
<p>“But it was not mere guess-work?”</p>
<p>“No, no: I never guess. It is a shocking habit,—destructive to the
logical faculty. What seems strange to you is only so because you do not follow
my train of thought or observe the small facts upon which large inferences may
depend. For example, I began by stating that your brother was careless. When
you observe the lower part of that watch-case you notice that it is not only
dinted in two places, but it is cut and marked all over from the habit of
keeping other hard objects, such as coins or keys, in the same pocket. Surely
it is no great feat to assume that a man who treats a fifty-guinea watch so
cavalierly must be a careless man. Neither is it a very far-fetched inference
that a man who inherits one article of such value is pretty well provided for
in other respects.”</p>
<p>I nodded, to show that I followed his reasoning.</p>
<p>“It is very customary for pawnbrokers in England, when they take a watch,
to scratch the number of the ticket with a pin-point upon the inside of the
case. It is more handy than a label, as there is no risk of the number being
lost or transposed. There are no less than four such numbers visible to my lens
on the inside of this case. Inference,—that your brother was often at low
water. Secondary inference,—that he had occasional bursts of prosperity,
or he could not have redeemed the pledge. Finally, I ask you to look at the
inner plate, which contains the key-hole. Look at the thousands of scratches
all round the hole,—marks where the key has slipped. What sober
man’s key could have scored those grooves? But you will never see a
drunkard’s watch without them. He winds it at night, and he leaves these
traces of his unsteady hand. Where is the mystery in all this?”</p>
<p>“It is as clear as daylight,” I answered. “I regret the
injustice which I did you. I should have had more faith in your marvellous
faculty. May I ask whether you have any professional inquiry on foot at
present?”</p>
<p>“None. Hence the cocaine. I cannot live without brain-work. What else is
there to live for? Stand at the window here. Was ever such a dreary, dismal,
unprofitable world? See how the yellow fog swirls down the street and drifts
across the dun-coloured houses. What could be more hopelessly prosaic and
material? What is the use of having powers, doctor, when one has no field upon
which to exert them? Crime is commonplace, existence is commonplace, and no
qualities save those which are commonplace have any function upon earth.”</p>
<p>I had opened my mouth to reply to this tirade, when with a crisp knock our
landlady entered, bearing a card upon the brass salver.</p>
<p>“A young lady for you, sir,” she said, addressing my companion.</p>
<p>“Miss Mary Morstan,” he read. “Hum! I have no recollection of
the name. Ask the young lady to step up, Mrs. Hudson. Don’t go, doctor. I
should prefer that you remain.”</p>
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