She had vanished.

He returned, and there she was.
"Speak!" he muttered; "speak!" But no word came, only the lovely changeless eyes shone on and watched him.
Listen! Music seemed to float about the room, such music as he had never heard--even Stella could not make the like.

The air was full of it, the night without was full of it, millions of voices took up the chant, and from far away, note by note, mighty organs and silver trumpets told its melody.
His brain reeled.

In the ocean of those unimagined harmonies it was tossed like a straw upon a swirling river, tossed and overwhelmed.
Slowly, very slowly, as the straw might be sucked into the heart of a whirlpool, his soul was drawn down into blackness.

It shuddered, it was afraid; this vision of a whirlpool haunted him.