he way, Watson, you spotted their presence in that
doorway with unerring accuracy--I took up what seemed to me to be a
judicious post for observation, never dreaming that he would choose the
same spot for his attack. Now, my dear Watson, does anything remain for
me to explain?"

"Yes," said I. "You have not made it clear what was Colonel Moran's
motive in murdering the Honourable Ronald Adair?"

"Ah! my dear Watson, there we come into those realms of conjecture,
where the most logical mind may be at fault. Each may form his own
hypothesis upon the present evidence, and yours is as likely to be
correct as mine."

"You have formed one, then?"

"I think that it is not difficult to explain the facts. It came out in
evidence that Colonel Moran and young Adair had, between them, won a
considerable amount of money. Now, undoubtedly played foul--of that I
have long been aware. I believe that on the day of the murder Adair had
discovered that Moran was cheating. Very likely he had spoken to him
privately, and had threatened to expose him unless he voluntarily
resigned his membership of the club, and promised not to play cards
again. It is unlikely that a youngster like Adair would at once make a
hideous scandal by exposing a well known man so much older than himself.
Probably he acted as I suggest. The exclusion from his clubs would mean
ruin to Moran, who lived by his ill-gotten card-gains. He therefore
murdered Adair, who at the time was endeavouring to work out how
much money he should himself return, since he could not profit by his
partner's foul play. He locked the door lest the ladies should surprise
him and insist upon knowing what he was doing with these names and
coins. Will it pass?"

"I have no doubt that you have hit upon the truth."

"It will be verified or disproved at the trial. Meanwhile, come what
may, Colonel Moran will trouble us no more. The famous air-gun of Von
Herder will embellish the Scotland Yard Museum, and once again
Mr. Sherlock Holmes is free to devote his life to examining those
interesting little problems which the complex life of London so
plentifully presents."

THE ADVENTURE OF THE NORWOOD BUILDER

"From the point of view of the criminal expert," said Mr. Sherlock
Holmes, "London has become a singularly uninteresting city since the
death of the late lamented Professor Moriarty."

"I can hardly think that you would find many decent citizens to agree
with you," I answered.