The Wizard of Oz by Lynam Frank Baum Chapter 12 Page 17

Then all the Winged Monkeys, with much laughing and chattering and noise, flew into the air and were soon out of sight.

The Wicked Witch was both surprised and worried when she saw the mark on Dorothy's forehead, for she knew well that neither the Winged Monkeys nor she, herself, dare hurt the girl in any way. She looked down at Dorothy's feet, and seeing the Silver Shoes, began to tremble with fear, for she knew what a powerful charm belonged to them.

At first the Witch was tempted to run away from Dorothy; but she happened to look into the child's eyes and saw how simple the soul behind them was, and that the little girl did not know of the wonderful power the Silver Shoes gave her. So the Wicked Witch laughed to herself, and thought, “I can still make her my slave, for she does not know how to use her power.”