Sherlock Holmes - Deductions

“This writing is of extraordinary interest,” said Holmes, who had been examining it with intense concentration.
“It was torn out of the dead man’s hand. Why was someone so anxious to get possession of it? Because it incriminated him. And what would he do with it? Thrust it into his pocket, most likely.”

“There cannot be the least doubt in the world that it has been written by two persons doing alternate words.”

“Obviously the business was a bad one, and one of the men who distrusted the other was determined that, whatever was done, each should have an equal hand in it. Now, of the two men, it is clear that the one who wrote the ‘at’ and ‘to’ was the ringleader.”

“If you examine this scrap with attention you will come to the conclusion that the man with the stronger hand wrote all his words first, leaving blanks for the other to fill up.”

“The man who wrote all his words first is undoubtedly the man who planned the affair.”

“There is something in common between these hands. They belong to men who are blood-relatives.”

“What I wanted, above all, was to get the missing part of that note. I was certain that Alec had torn it out of the dead man’s hand, and almost certain that he must have thrust it into the pocket of his dressing-gown. Where else could he have put it?”