In the front of the book Hans Christian Andersen had written a beautiful poem about Vosborg. It was no wonder that Mr. Christianson treasured this book, for Andersen is the most famous writer of all Denmark. Children all over the world love his fairy tales.
"It's getting late, Greta, and I think we should—" began Anna and then stopped. A long, low moan cut through the stillness of the room. It seemed to come from quite near.
"What—what was that?" asked Greta.
"Oh, I suppose that was Lady Margaret," explained Mr. Christianson. "About a hundred years ago she was kept a prisoner in this room for many years, and every now and then we hear her moaning."
"Did you ever see her?" asked Anna.
"Well, no, I never did. But whenever we hear that low moan from this room we know it is Lady Margaret."
"Doesn't it frighten you?" asked Greta.
"Oh, no. We are quite used to it."
"This is really a haunted castle, isn't it?" asked Anna.
"Every castle in Denmark has at least one ghost, Anna."