South Wind always blows me faint.

If it were not for the cool of the thick ice between me and her, I should faint altogether.
Indeed, as it is, I fear I must vanish." Diamond stared at her in terror, for he saw that her form and face were growing, not small, but transparent, like something dissolving, not in water, but in light.

He could see the side of the blue cave through her very heart.

And she melted away till all that was left was a pale face, like the moon in the morning, with two great lucid eyes in it.
"I am going, Diamond," she said.
"Does it hurt you ?" asked Diamond.
"It's very uncomfortable," she answered; "but I don't mind it, for I shall come all right again before long.

I thought I should be able to go with you all the way, but I cannot.