Sherlock Holmes - Deductions

“I confess that you had one small surprise for me,” said Holmes. “I did not anticipate that you would yourself make use of this empty house and this convenient front window. I had imagined you as operating from the street, where my friend Lestrade and his merry men were awaiting you. With that exception, all has gone as I expected.”
“It came out in evidence that Colonel Moran and young Adair had, between them, won a considerable amount of money. Now, Moran 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.”