Yes, I should almost have said so.

[A light breaking in upon him.] And behind the white figure? Following close upon her—?

Yes—at a little distance—

Aha! Then I think I can explain the mystery, Professor.

Well, what was it then?

[Simultaneously.] Was the professor really not dreaming?

[Suddenly whispering, as he directs their attention towards the background on the right.] Hush, if you please! Look there—don't speak loud for a moment.

    [A slender lady, dressed in fine, cream-white cashmere, and
       followed by a SISTER OF MERCY in black, with a silver cross
       hanging by a chain on her breast, comes forward from behind
       the hotel and crosses the park towards the pavilion in front
       on the left.  Her face is pale, and its lines seem to have
       stiffened; the eyelids are drooped and the eyes appear as
       though they saw nothing.  Her dress comes down to her feet
       and clings to the body in perpendicular folds.  Over her head,
       neck, breast, shoulders and arms she wears a large shawl of
       white crape.  She keeps her arms crossed upon her breast.
       She carries her body immovably, and her steps are stiff and
       measured.  The SISTER's bearing is also measured, and she has
       the air of a servant.  She keeps her brown piercing eyes
       incessantly fixed upon the lady.  WAITERS, with napkins on
       their arms, come forward in the hotel doorway, and cast
       curious glances at the strangers, who take no notice of
       anything, and, without looking round, enter the pavilion