Whether or not a quarrel had taken place between them no one ever knew.

But suddenly people remarked that they scarcely spoke when they met and that Campbell seemed always to go away early from any party at which Dorian Gray was present.

He had changed, too--was strangely melancholy at times, appeared almost to dislike hearing music, and would never himself play, giving as his excuse, when he was called upon, that he was so absorbed in science that he had no time left in which to practise.

And this was certainly true.

Every day he seemed to become more interested in biology, and his name appeared once or twice in some of the scientific reviews in connection with certain curious experiments.
This was the man Dorian Gray was waiting for.