I keep on—incessantly—in silence and alone—brooding on that very thought.

Yes, that seems to me perfectly natural.

[Looks somewhat searchingly at her.] Perhaps you have noticed it already?

No, indeed I haven't.

But just now—when you said you thought I was—off my balance? In one thing, you said—

Oh, I was thinking of something quite different.

What was it?

I am not going to tell you.

[Crosses the room.] Well, well—as you please. [Stops at the bow-window.] Come here, and I will show you something.

[Approaching.] What is it?