c. How do you think Bob has become razor-sharp? in short
Answers
Bob's hand obviously trembled because he was experiencing a strong emotion, or a combination of emotions. O. Henry seems to be leaving it up to the reader to guess what emotions these were. No doubt, Bob was surprised, disappointed, angry, resentful, shocked, and frightened. We don't know exactly why he was wanted by the police in Chicago. It could have been for something so serious that he would be facing the death penalty or at least a long term in prison. O. Henry hints that Silky Bob is a confidence trickster, but he could have gotten into a situation that led to a more serious crime.
Bob tells Jimmy, whom he doesn't recognize:
"I've had to compete with some of the sharpest wits going to get my pile. A man gets in a groove in New York. It takes the West to put a razor-edge on him."
Such remarks suggest that Bob was living by his wits at some sort or racket and was not involved in anything that could lead to capital punishment. At the same time, they would suggest that Silky Bob's strongest emotion was caused by his realization that he, the slick, worlldly wise trickster, had been tricked himself, and tricked by a man he considered inferior to himself as far as cleverness and imagination were concerned.
Answer:
because he on eye of the police