"I've a cab at the door, and it won't take us twenty minutes to
Victoria. But about this picture: I thought you told me once, Mr.
Holmes, that you had never met Professor Moriarty."

"No, I never have."

"Then how do you know about his rooms?"

"Ah, that's another matter. I have been three times in his
rooms, twice waiting for him under different pretexts and leaving
before he came. Once -- well, I can hardly tell about the once to
an official detective. It was on the last occasion that I took the
liberty of running over his papers -- with the most unexpected
results."

"You found something compromising?"

"Absolutely nothing. That was what amazed me. However,
you have now seen the point of the picture. It shows him to be a
very wealthy man. How did he acquire wealth? He is unmarried.
His younger brother is a station master in the west of England.
His chair is worth seven hundred a year. And he owns a Greuze."

"Well?"

"Surely the inference is plain."

"You mean that he has a great income and that he must earn it
in an illegal fashion?"

"Exactly. Of course I have other reasons for thinking so --
dozens of exiguous threads which lead vaguely up towards the
centre of the web where the poisonous, motionless creature is
lurking. I only mention the Greuze because it brings the matter
within the range of your own observation."

"Well, Mr. Holmes, I admit that what you say is interesting:
it's more than interesting -- it's just wonderful. But let us have it
a little clearer if you can. Is it forgery, coining, burglary -- where
does the money come from?"

"Have you ever read of Jonathan Wild?"

"Well, the name has a familiar sound. Someone in a novel,
was he not? I don't take much stock of detectives in novels --
chaps that do things and never let you see how they do them.
That's just inspiration: not business."

"Jonathan Wild wasn't a detective, and he wasn't in a novel.
He was a master criminal, and he lived last century -- 1750 or
thereabouts."

"Then he's no use to me. I'm a practical man."

"Mr. Mac, the most practical thing that you ever did in your
life would be to shut yourself up for three months and read
twelve hours a day at the annals of crime. Everything comes in
circles -- even Professor Moriarty. Jonathan Wild was the hidden
force of the London criminals, to whom he sold his brains and
his organization on a fifteen per cent commission. The old
wheel turns, and the same spoke comes up. It's all been done
before, and will be again. I'll tell you one or two things about
Moriarty which may interest you."

"You'll interest me, right enough."

"I happen to know who is the first link in his chain -- a chain
with this Napoleon-gone-wrong at one end, and a hundred broken
fighting men, pickpockets, blackmailers, and card sharpers at the
other, with every sort of crime in between. His chief of staff is
Colonel Sebastian Moran, as aloof and guarded and inaccessible
to the law as himself. What do you think he pays him?"

"I'd like to hear."

"Six thousand a year. That's paying for brains, you see -- the
American business principle. I learned that detail quite by chance.
It's more than the Prime Minister gets. That gives you an idea of
Moriarty's gains and of the scale on which he works. Another
point: I made it my business to hunt down some of Moriarty's
checks lately -- just common innocent checks that he pays his
household bills with. They were drawn on six different banks.
Does that make any impression on your mind?"

"Queer, certainly! But what do you gather from it?"

"That he wanted no gossip about his wealth. No single man
should know what he had. I have no doubt that he has twenty
banking accounts; the bulk of his fortune abroad in the Deutsche
Bank or the Credit Lyonnais as likely as not. Sometime when
you have a year or two to spare I commend to you the study of
Professor Moriarty."

Inspector MacDonald had grown steadily more impressed as
the conversation proceeded. He had lost himself in his interest.
Now his practical Scotch intelligence brought him back with a
snap to the matter in hand.

"He can keep, anyhow," said he. "You've got us side-tracked
with your interesting anecdotes, Mr. Holmes. What really counts