It was curious—that sense of dull uneasiness that came over him so suddenly, so stealthily at first he scarcely noticed it, but with such marked increase after a time that he presently got up and left the theater. His seat was on the gangway of the dress circle, and he slipped out awkwardly in the middle of what seemed to be the best and jolliest song of the piece. The full house was shaking with laughter; so infectious was the gaiety that even strangers turned to one another as much as to say, "Now, isn't that funny?"