The Princess and Curdie

They had just risen and were turning to the right, when a gleam caught their eyes, and made them look along the whole gallery. Far up they saw a pale green light, whence issuing they could not tell, about halfway between floor and roof of the passage. They saw nothing but the light, which was like a large star, with a point of darker colour yet brighter radiance in the heart of it, whence the rest of the light shot out in rays that faded toward the ends until they vanished.