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there or take a train without being observed。 This is the garden
path of which I spoke； Mr。 Holmes。 I'll pledge my word there was no
mark on it yesterday。〃
〃On which side were the marks on the grass？〃
〃This side； sir。 This narrow margin of grass between the path and
the flowerbed。 I can't see the traces now； but they were clear to me
then。〃
〃Yes； yes： someone has passed along；〃 said Holmes； stooping over the
grass border。 〃Our lady must have picked her steps carefully； must she
not； since on the one side she would leave a track on the path； and on
the other an even clearer one on the soft bed？〃
〃Yes； sir； she must have been a cool hand。〃
I saw an intent look pass over Holmes's face。
〃You say that she must have come back this way？〃
〃Yes； sir； there is no other。〃
〃On this strip of grass？〃
〃Certainly； Mr。 Holmes。〃
〃Hum！ It was a very remarkable performance… very remarkable。 Well； I
think we have exhausted the path。 Let us go farther。 This garden
door is usually kept open； I suppose？ Then this visitor had nothing to
do but to walk in。 The idea of murder was not in her mind； or she
would have provided herself with some sort of weapon； instead of
having to pick this knife off the writing…table。 She advanced along
this corridor； leaving no traces upon the cocoanut matting。 Then she
found herself in this study。 How long was she there？ We have no
means of judging。〃
〃Not more than a few minutes； sir。 I forgot to tell you that Mrs。
Marker； the housekeeper； had been in there tidying not very； long
before… about a quarter of an hour； she says。〃
〃Well； that gives us a limit。 Our lady enters this room； and what
does she do？ She goes over to the writing…table。 What for？ Not for
anything in the drawers。 If there had been anything worth her
taking； it would surely have been locked up。 No； it was for
something in that wooden bureau。 Halloa！ what is that scratch upon the
face of it？ Just hold a match； Watson。 Why did you not tell me of
this； Hopkins？〃
The mark which he was examining began upon the brasswork on the
righthand side of the keyhole； and extended for about four inches；
where it had scratched the varnish from the surface。
〃I noticed it； Mr。 Holmes； but you'll always find scratches round
a keyhole。〃
〃This is recent； quite recent。 See how the brass shines where it
is cut。 An old scratch would be the same colour as the surface。 Look
at it through my lens。 There's the varnish； too； like earth on each
side of a furrow。 Is Mrs。 Marker there？〃
A sad…faced； elderly woman came into the room。
〃Did you dust this bureau yesterday morning？〃
〃Yes； sir。〃
〃Did you notice this scratch？〃
〃No； sir； I did not。〃
〃I am sure you did not； for a duster would have swept away these
shreds of varnish。 Who has the key of this bureau？〃
〃The Professor keeps it on his watch…chain。〃
〃Is it a simple key？〃
〃No； sir； it is a Chubb's key。〃
〃Very good。 Mrs。 Marker； you can go。 Now we are making a little
progress。 Our lady enters the room； advances to the bureau； and either
opens it or tries to do so。 While she is thus engaged； young
Willoughby Smith enters the room。 In her hurry to withdraw the key；
she makes this scratch upon the door。 He seizes her； and she；
snatching up the nearest object； which happens to be this knife；
strikes at him in order to make him let go his hold。 The blow is a
fatal one。 He falls and she escapes； either with or without the object
for which she has come。 Is Susan； the maid； there？ Could anyone have
got away through that door after the time that you heard the cry；
Susan？〃
〃No sir； it is impossible。 Before I got down the stair； I'd have
seen anyone in the passage。 Besides； the door never opened； or I would
have heard it。〃
〃That settles this exit。 Then no doubt the lady went out the way she
came。 I understand that this other passage leads only to the
professor's room。 There is no exit that way？〃
〃No； sir。〃
〃We shall go down it and make the acquaintance of the professor。
Halloa； Hopkins！ this is very important； very important indeed。 The
professor's corridor is also lined with cocoanut matting。〃
〃Well； sir； what of that？〃
〃Don't you see any bearing upon the case？ Well； well。 I don't insist
upon it。 No doubt I am wrong。 And yet it seems to me to be suggestive。
Come with me and introduce me。〃
We passed down the passage； which was of the same length as that
which led to the garden。 At the end was a short flight of steps ending
in a door。 Our guide knocked； and then ushered us into the professor's
bedroom。
It was a very large chamber； lined with innumerable volumes； which
had overflowed from the shelves and lay in piles in the corners； or
were stacked all round at the base of the cases。 The bed was in the
centre of the room； and in it； propped up with pillows； was the
owner of the house。 I have seldom seen a more remarkable looking
person。 It was a gaunt； aquiline face which was turned towards us；
with piercing dark eyes； which lurked in deep hollows under overhung
and tufted brows。 His hair and beard were white； save that the
latter was curiously stained with yellow around his mouth。 A cigarette
glowed amid the tangle of white hair； and the air of the room was
fetid with stale tobacco smoke。 As he held out his hand to Holmes； I
perceived that it was also stained with yellow nicotine。
〃A smoker； Mr。 Holmes？〃 said he； speaking in well…chosen English；
with a curious little mincing accent。 〃Pray take a cigarette。 And you；
sir？ I can recommend them； for I have them especially prepared by
Ionides； of Alexandria。 He sends me a thousand at a time； and I grieve
to say that I have to arrange for a fresh supply every fortnight。 Bad；
sir； very bad； but an old man has few pleasures。 Tobacco and my
work… that is all that is left to me。〃
Holmes had lit a cigarette and was shooting little darting glances
all over the room。
〃Tobacco and my work； but now only tobacco；〃 the old man
exclaimed。 〃Alas！ what a fatal interruption！ Who could have foreseen
such a terrible catastrophe？ So estimable a young man！ I assure you
that； after a few months' training； he was an admirable assistant。
What do you think of the matter； Mr。 Holmes？〃
〃I have not yet made up my mind。〃
〃I shall indeed be indebted to you if you can throw a light where
all is so dark to us。 To a poor bookworm and invalid like myself
such a blow is paralyzing。 I seem to have lost the faculty of thought。
But you are a man of action… you are a man of affairs。 It is part of
the everyday routine of your life。 You can preserve your balance in
every emergency。 We are fortunate； indeed； in having you at our side。〃
Holmes was pacing up and down one side of the room whilst the old
professor was talking。 I observed that he was smoking with
extraordinary rapidity。 It was evident that he shared our host's
liking for the fresh Alexandrian cigarettes。
〃Yes； sir； it is a crushing blow；〃 said the old man。 〃That is my
magnum opus… the pile of papers on the side table yonder。 It is my
analysis of the documents found i