Oswald.

Well, you must know that all this fatigue—and my inability to think of work—all that is not the illness itself——

Mrs. Alving.

Then what is the illness itself?

Oswald.

The disease I have as my birthright—[He points to his forehead and adds very softly]—is seated here.

Mrs. Alving.

[Almost voiceless.] Oswald! No—no!

Oswald.

Don’t scream. I can’t bear it. Yes, mother, it is seated here—waiting. And it may break out any day—at any moment.