King Halfdan lived in Norway long ago. One morning his queen said to him:

"I had a strange dream last night. I thought that I stood in the grass before my bower. I pulled a thorn from my dress. As I held it in my fingers, it grew into a tall tree. The trunk was thick and red as blood, but the lower limbs were fair and green, and the highest ones were white. I thought that the branches of this great tree spread so far that they covered all Norway and even more."