Dorothy was incredibly unhappy being held at the Wicked Witch of the West's castle. The Wicked Witch made Dorothy wash pots and kettles, constantly attend to the fire, and sweep the floor. The Witch threatened to beat Dorothy if she did not complete her tasks.
Oh, how miserable it is here! I miss Uncle Henry and Aunt Em!
The Wicked Witch of the West desperately wanted Dorothy's Silver Slippers. She no longer had her Bees, her Crows, her Wolves, or the power of the Golden Cap. While she had threatened Dorothy, she did not have a chance of touching her unless she had the magic of the Silver Slippers, which Dorothy did not know about.
Dorothy is protected by the kiss of the Witch of the North. I must get her Silver Slippers.
The Wicked Witch devised a plan. She placed an invisible iron bar in Dorothy's path, so that the girl tripped and fell on it when she walked by. The slipper was snatched triumphantly by the Witch before Dorothy could do anything, and the Witch put the Silver Slipper on her foot.
Give me back my shoe! You are a wicked creature, you have no right to take that!
I will not give it back, for it is now mine and not yours! Some day I shall have the other one from you, too.
This made Dorothy irate. She grabbed a bucket of water that was very near to her and splashed it onto the Witch, dousing her completely.
Dorothy had no idea what this actually would have done to the Witch. She was frightened as she saw that the Witch began to melt before her eyes into a brown puddle.
See what you have done? Didn't you know water would be the end of me? In a few minutes I shall all be melted, and you will have the castle to yourself. Look out, here I go!
Of course I didn't know, how should I have? I am very sorry indeed!
Soon, all that was left of the Wicked Witch of the West was the shapeless mass and Dorothy's Silver Slipper. Dorothy began to clean up the mess with another bucket of water and a broom, and then she put the Silver Slipper back on. The Wicked Witch was dead.