Blinker was displeased. A man of less culture and poise and wealth
would have sworn. But Blinker always remembered that he was a gentleman—a thing that no gentleman should do. So he merely looked bored and sardonic while he rode in a hansom to the center of disturbance, which was the Broadway office of Lawyer Oldport, who was agent for the Blinker estate.
http://en.wikisource.org/wiki/Brickdust_Row**
From Brickdust Row by O. Henry.
The underlined part, does it mean that "A man of less culture and poise and wealth would have sworn that Blinker was displeased."?