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<h2> CHAPTER II. THE SCIENCE OF DEDUCTION. </h2>
<p>WE met next day as he had arranged, and inspected the rooms at No. 221B,
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Baker Street, of which he had spoken at our meeting. They consisted of a
couple of comfortable bed-rooms and a single large airy sitting-room,
cheerfully furnished, and illuminated by two broad windows. So desirable
in every way were the apartments, and so moderate did the terms seem when
divided between us, that the bargain was concluded upon the spot, and we
at once entered into possession. That very evening I moved my things round
from the hotel, and on the following morning Sherlock Holmes followed me
with several boxes and portmanteaus. For a day or two we were busily
employed in unpacking and laying out our property to the best advantage.
That done, we gradually began to settle down and to accommodate ourselves
to our new surroundings.</p>
<p>Holmes was certainly not a difficult man to live with. He was quiet in his
ways, and his habits were regular. It was rare for him to be up after ten
at night, and he had invariably breakfasted and gone out before I rose in
the morning. Sometimes he spent his day at the chemical laboratory,
sometimes in the dissecting-rooms, and occasionally in long walks, which
appeared to take him into the lowest portions of the City. Nothing could
exceed his energy when the working fit was upon him; but now and again a
reaction would seize him, and for days on end he would lie upon the sofa
in the sitting-room, hardly uttering a word or moving a muscle from
morning to night. On these occasions I have noticed such a dreamy, vacant
expression in his eyes, that I might have suspected him of being addicted
to the use of some narcotic, had not the temperance and cleanliness of his
whole life forbidden such a notion.</p>
<p>As the weeks went by, my interest in him and my curiosity as to his aims
in life, gradually deepened and increased. His very person and appearance
were such as to strike the attention of the most casual observer. In
height he was rather over six feet, and so excessively lean that he seemed
to be considerably taller. His eyes were sharp and piercing, save during
those intervals of torpor to which I have alluded; and his thin, hawk-like
nose gave his whole expression an air of alertness and decision. His chin,
too, had the prominence and squareness which mark the man of
determination. His hands were invariably blotted with ink and stained with
chemicals, yet he was possessed of extraordinary delicacy of touch, as I
frequently had occasion to observe when I watched him manipulating his
fragile philosophical instruments.</p>
<p>The reader may set me down as a hopeless busybody, when I confess how much
this man stimulated my curiosity, and how often I endeavoured to break
through the reticence which he showed on all that concerned himself.
Before pronouncing judgment, however, be it remembered, how objectless was
my life, and how little there was to engage my attention. My health
forbade me from venturing out unless the weather was exceptionally genial,
and I had no friends who would call upon me and break the monotony of my
daily existence. Under these circumstances, I eagerly hailed the little
mystery which hung around my companion, and spent much of my time in
endeavouring to unravel it.</p>
<p>He was not studying medicine. He had himself, in reply to a question,
confirmed Stamford’s opinion upon that point. Neither did he appear to
have pursued any course of reading which might fit him for a degree in
science or any other recognized portal which would give him an entrance
into the learned world. Yet his zeal for certain studies was remarkable,
and within eccentric limits his knowledge was so extraordinarily ample and
minute that his observations have fairly astounded me. Surely no man would
work so hard or attain such precise information unless he had some
definite end in view. Desultory readers are seldom remarkable for the
exactness of their learning. No man burdens his mind with small matters
unless he has some very good reason for doing so.</p>
<p>His ignorance was as remarkable as his knowledge. Of contemporary
literature, philosophy and politics he appeared to know next to nothing.
Upon my quoting Thomas Carlyle, he inquired in the naivest way who he
might be and what he had done. My surprise reached a climax, however, when
I found incidentally that he was ignorant of the Copernican Theory and of
the composition of the Solar System. That any civilized human being in
this nineteenth century should not be aware that the earth travelled round
the sun appeared to be to me such an extraordinary fact that I could
hardly realize it.</p>
<p>“You appear to be astonished,” he said, smiling at my expression of
surprise. “Now that I do know it I shall do my best to forget it.”</p>
<p>“To forget it!”</p>
<p>“You see,” he explained, “I consider that a man’s brain originally is like
a little empty attic, and you have to stock it with such furniture as you
choose. A fool takes in all the lumber of every sort that he comes across,
so that the knowledge which might be useful to him gets crowded out, or at
best is jumbled up with a lot of other things so that he has a difficulty
in laying his hands upon it. Now the skilful workman is very careful
indeed as to what he takes into his brain-attic. He will have nothing but
the tools which may help him in doing his work, but of these he has a
large assortment, and all in the most perfect order. It is a mistake to
think that that little room has elastic walls and can distend to any
extent. Depend upon it there comes a time when for every addition of
knowledge you forget something that you knew before. It is of the highest
importance, therefore, not to have useless facts elbowing out the useful
ones.”</p>
<p>“But the Solar System!” I protested.</p>
<p>“What the deuce is it to me?” he interrupted impatiently; “you say that we
go round the sun. If we went round the moon it would not make a pennyworth
of difference to me or to my work.”</p>
<p>I was on the point of asking him what that work might be, but something in
his manner showed me that the question would be an unwelcome one. I
pondered over our short conversation, however, and endeavoured to draw my
deductions from it. He said that he would acquire no knowledge which did
not bear upon his object. Therefore all the knowledge which he possessed
was such as would be useful to him. I enumerated in my own mind all the
various points upon which he had shown me that he was exceptionally
well-informed. I even took a pencil and jotted them down. I could not help
smiling at the document when I had completed it. It ran in this way—</p>
<p>SHERLOCK HOLMES—his limits.</p>
<p>1. Knowledge of Literature.—Nil.<br/>
2. Philosophy.—Nil.<br/>
3. Astronomy.—Nil.<br/>
4. Politics.—Feeble.<br/>
5. Botany.—Variable. Well up in belladonna,<br/>
opium, and poisons generally.<br/>
Knows nothing of practical gardening.<br/>
6. Geology.—Practical, but limited.<br/>
Tells at a glance different soils<br/>
from each other. After walks has<br/>
shown me splashes upon his trousers,<br/>
and told me by their colour and<br/>
consistence in what part of London<br/>
he had received them.<br/>
7. Chemistry.—Profound.<br/>
8. Anatomy.—Accurate, but unsystematic.<br/>
9. Sensational Literature.—Immense. He appears<br/>
to know every detail of every horror<br/>
perpetrated in the century.<br/>
10. Plays the violin well.<br/>
11. Is an expert singlestick player, boxer, and swordsman.<br/>
12. Has a good practical knowledge of British law.<br/></p>
<p>When I had got so far in my list I threw it into the fire in despair. “If
I can only find what the fellow is driving at by reconciling all these
accomplishments, and discovering a calling which needs them all,” I said
to myself, “I may as well give up the attempt at once.”</p>
<p>I see that I have alluded above to his powers upon the violin. These were
very remarkable, but as eccentric as all his other accomplishments. That
he could play pieces, and difficult pieces, I knew well, because at my
request he has played me some of Mendelssohn’s Lieder, and other
favourites. When left to himself, however, he would seldom produce any
music or attempt any recognized air. Leaning back in his arm-chair of an
evening, he would close his eyes and scrape carelessly at the fiddle which
was thrown across his knee. Sometimes the chords were sonorous and
melancholy. Occasionally they were fantastic and cheerful. Clearly they
reflected the thoughts which possessed him, but whether the music aided
those thoughts, or whether the playing was simply the result of a whim or
fancy was more than I could determine. I might have rebelled against these
exasperating solos had it not been that he usually terminated them by
playing in quick succession a whole series of my favourite airs as a
slight compensation for the trial upon my patience.</p>
<p>During the first week or so we had no callers, and I had begun to think
that my companion was as friendless a man as I was myself. Presently,
however, I found that he had many acquaintances, and those in the most
different classes of society. There was one little sallow rat-faced,
dark-eyed fellow who was introduced to me as Mr. Lestrade, and who came
three or four times in a single week. One morning a young girl called,
fashionably dressed, and stayed for half an hour or more. The same
afternoon brought a grey-headed, seedy visitor, looking like a Jew pedlar,
who appeared to me to be much excited, and who was closely followed by a
slip-shod elderly woman. On another occasion an old white-haired gentleman
had an interview with my companion; and on another a railway porter in his
velveteen uniform. When any of these nondescript individuals put in an
appearance, Sherlock Holmes used to beg for the use of the sitting-room,
and I would retire to my bed-room. He always apologized to me for putting
me to this inconvenience. “I have to use this room as a place of
business,” he said, “and these people are my clients.” Again I had an
opportunity of asking him a point blank question, and again my delicacy
prevented me from forcing another man to confide in me. I imagined at the
time that he had some strong reason for not alluding to it, but he soon
dispelled the idea by coming round to the subject of his own accord.</p>
<p>It was upon the 4th of March, as I have good reason to remember, that I
rose somewhat earlier than usual, and found that Sherlock Holmes had not
yet finished his breakfast. The landlady had become so accustomed to my
late habits that my place had not been laid nor my coffee prepared. With
the unreasonable petulance of mankind I rang the bell and gave a curt
intimation that I was ready. Then I picked up a magazine from the table
and attempted to while away the time with it, while my companion munched
silently at his toast. One of the articles had a pencil mark at the
heading, and I naturally began to run my eye through it.</p>
<p>Its somewhat ambitious title was “The Book of Life,” and it attempted to
show how much an observant man might learn by an accurate and systematic
examination of all that came in his way. It struck me as being a
remarkable mixture of shrewdness and of absurdity. The reasoning was close
and intense, but the deductions appeared to me to be far-fetched and
exaggerated. The writer claimed by a momentary expression, a twitch of a
muscle or a glance of an eye, to fathom a man’s inmost thoughts. Deceit,
according to him, was an impossibility in the case of one trained to
observation and analysis. His conclusions were as infallible as so many
propositions of Euclid. So startling would his results appear to the
uninitiated that until they learned the processes by which he had arrived
at them they might well consider him as a necromancer.</p>
<p>“From a drop of water,” said the writer, “a logician could infer the
possibility of an Atlantic or a Niagara without having seen or heard of
one or the other. So all life is a great chain, the nature of which is
known whenever we are shown a single link of it. Like all other arts, the
Science of Deduction and Analysis is one which can only be acquired by
long and patient study nor is life long enough to allow any mortal to
attain the highest possible perfection in it. Before turning to those
moral and mental aspects of the matter which present the greatest
difficulties, let the enquirer begin by mastering more elementary
problems. Let him, on meeting a fellow-mortal, learn at a glance to
distinguish the history of the man, and the trade or profession to which
he belongs. Puerile as such an exercise may seem, it sharpens the
faculties of observation, and teaches one where to look and what to look
for. By a man’s finger nails, by his coat-sleeve, by his boot, by his
trouser knees, by the callosities of his forefinger and thumb, by his
expression, by his shirt cuffs—by each of these things a man’s
calling is plainly revealed. That all united should fail to enlighten the
competent enquirer in any case is almost inconceivable.”</p>
<p>“What ineffable twaddle!” I cried, slapping the magazine down on the
table, “I never read such rubbish in my life.”</p>
<p>“What is it?” asked Sherlock Holmes.</p>
<p>“Why, this article,” I said, pointing at it with my egg spoon as I sat
down to my breakfast. “I see that you have read it since you have marked
it. I don’t deny that it is smartly written. It irritates me though. It is
evidently the theory of some arm-chair lounger who evolves all these neat
little paradoxes in the seclusion of his own study. It is not practical. I
should like to see him clapped down in a third class carriage on the
Underground, and asked to give the trades of all his fellow-travellers. I
would lay a thousand to one against him.”</p>
<p>“You would lose your money,” Sherlock Holmes remarked calmly. “As for the
article I wrote it myself.”</p>
<p>“You!”</p>
<p>“Yes, I have a turn both for observation and for deduction. The theories
which I have expressed there, and which appear to you to be so chimerical
are really extremely practical—so practical that I depend upon them
for my bread and cheese.”</p>
<p>“And how?” I asked involuntarily.</p>
<p>“Well, I have a trade of my own. I suppose I am the only one in the world.
I’m a consulting detective, if you can understand what that is. Here in
London we have lots of Government detectives and lots of private ones.
When these fellows are at fault they come to me, and I manage to put them
on the right scent. They lay all the evidence before me, and I am
generally able, by the help of my knowledge of the history of crime, to
set them straight. There is a strong family resemblance about misdeeds,
and if you have all the details of a thousand at your finger ends, it is
odd if you can’t unravel the thousand and first. Lestrade is a well-known
detective. He got himself into a fog recently over a forgery case, and
that was what brought him here.”</p>
<p>“And these other people?”</p>
<p>“They are mostly sent on by private inquiry agencies. They are all people
who are in trouble about something, and want a little enlightening. I
listen to their story, they listen to my comments, and then I pocket my
fee.”</p>
<p>“But do you mean to say,” I said, “that without leaving your room you can
unravel some knot which other men can make nothing of, although they have
seen every detail for themselves?”</p>
<p>“Quite so. I have a kind of intuition that way. Now and again a case turns
up which is a little more complex. Then I have to bustle about and see
things with my own eyes. You see I have a lot of special knowledge which I
apply to the problem, and which facilitates matters wonderfully. Those
rules of deduction laid down in that article which aroused your scorn, are
invaluable to me in practical work. Observation with me is second nature.
You appeared to be surprised when I told you, on our first meeting, that
you had come from Afghanistan.”</p>
<p>“You were told, no doubt.”</p>
<p>“Nothing of the sort. I <i>knew</i> you came from Afghanistan. From long
habit the train of thoughts ran so swiftly through my mind, that I arrived
at the conclusion without being conscious of intermediate steps. There
were such steps, however. The train of reasoning ran, ‘Here is a gentleman
of a medical type, but with the air of a military man. Clearly an army
doctor, then. He has just come from the tropics, for his face is dark, and
that is not the natural tint of his skin, for his wrists are fair. He has
undergone hardship and sickness, as his haggard face says clearly. His
left arm has been injured. He holds it in a stiff and unnatural manner.
Where in the tropics could an English army doctor have seen much hardship
and got his arm wounded? Clearly in Afghanistan.’ The whole train of
thought did not occupy a second. I then remarked that you came from
Afghanistan, and you were astonished.”</p>
<p>“It is simple enough as you explain it,” I said, smiling. “You remind me
of Edgar Allen Poe’s Dupin. I had no idea that such individuals did exist
outside of stories.”</p>
<p>Sherlock Holmes rose and lit his pipe. “No doubt you think that you are
complimenting me in comparing me to Dupin,” he observed. “Now, in my
opinion, Dupin was a very inferior fellow. That trick of his of breaking
in on his friends’ thoughts with an apropos remark after a quarter of an
hour’s silence is really very showy and superficial. He had some
analytical genius, no doubt; but he was by no means such a phenomenon as
Poe appeared to imagine.”</p>
<p>“Have you read Gaboriau’s works?” I asked. “Does Lecoq come up to your
idea of a detective?”</p>
<p>Sherlock Holmes sniffed sardonically. “Lecoq was a miserable bungler,” he
said, in an angry voice; “he had only one thing to recommend him, and that
was his energy. That book made me positively ill. The question was how to
identify an unknown prisoner. I could have done it in twenty-four hours.
Lecoq took six months or so. It might be made a text-book for detectives
to teach them what to avoid.”</p>
<p>I felt rather indignant at having two characters whom I had admired
treated in this cavalier style. I walked over to the window, and stood
looking out into the busy street. “This fellow may be very clever,” I said
to myself, “but he is certainly very conceited.”</p>
<p>“There are no crimes and no criminals in these days,” he said,
querulously. “What is the use of having brains in our profession. I know
well that I have it in me to make my name famous. No man lives or has ever
lived who has brought the same amount of study and of natural talent to
the detection of crime which I have done. And what is the result? There is
no crime to detect, or, at most, some bungling villainy with a motive so
transparent that even a Scotland Yard official can see through it.”</p>
<p>I was still annoyed at his bumptious style of conversation. I thought it
best to change the topic.</p>
<p>“I wonder what that fellow is looking for?” I asked, pointing to a
stalwart, plainly-dressed individual who was walking slowly down the other
side of the street, looking anxiously at the numbers. He had a large blue
envelope in his hand, and was evidently the bearer of a message.</p>
<p>“You mean the retired sergeant of Marines,” said Sherlock Holmes.</p>
<p>“Brag and bounce!” thought I to myself. “He knows that I cannot verify his
guess.”</p>
<p>The thought had hardly passed through my mind when the man whom we were
watching caught sight of the number on our door, and ran rapidly across
the roadway. We heard a loud knock, a deep voice below, and heavy steps
ascending the stair.</p>
<p>“For Mr. Sherlock Holmes,” he said, stepping into the room and handing my
friend the letter.</p>
<p>Here was an opportunity of taking the conceit out of him. He little
thought of this when he made that random shot. “May I ask, my lad,” I
said, in the blandest voice, “what your trade may be?”</p>
<p>“Commissionaire, sir,” he said, gruffly. “Uniform away for repairs.”</p>
<p>“And you were?” I asked, with a slightly malicious glance at my companion.</p>
<p>“A sergeant, sir, Royal Marine Light Infantry, sir. No answer? Right,
sir.”</p>
<p>He clicked his heels together, raised his hand in a salute, and was gone.</p>
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