L. Frank Baum

“ In the center of this lake appeared a lovely island, not of great extent but almost entirely covered by a huge round building with glass walls and a high glass dome which glittered brilliantly in the sunshine. ”

“ With the other hand she grasped the hand of Dorothy, but these motions were so natural that the Su-dic did not notice them. Then when he turned to meet his four soldiers, Ozma instantly rendered both herself and Dorothy invisible and swiftly led her companion around the group of Flatheads and out of the room. As they reached the entry and descended the stone steps, Ozma whispered:
"Let us run, dear! We are invisible, so no one will see us." ”