What Contains Dreams And Nightmares In The Ice Palace?

Nightmares are not mentioned. Dreams can be found in one section of the text.

"You see," she continued, her voice still husky, her eyes glistening with tears, "people have these dreams they fasten onto things, and I've always grown up with that dream. It was so easy because it was all dead and there weren't any disillusions comin' to me. I've tried in a way to live up to those past standards of noblesse oblige-- there's just the last remnants of it, you know, like the roses of an old garden dying all round us-- streaks of strange courtliness and chivalry in some of these boys an' stories I used to hear from a Confederate soldier who lived next door, and a few old darkies. Oh, Harry, there was something, there was something! I couldn't ever make you understand, but it was there."