When Mrs. Medlock found Mary wandering around the house, what does Mrs. Medlock do?

Mrs. Medlock dragged Mary back to her room and told her if she found her wandering again, she'd be locked in her room.

"What are you doing here?" she said, and she took Mary by the arm and pulled her away. "What did I tell you?"

"I turned round the wrong corner," explained Mary. "I didn't know which way to go and I heard some one crying." She quite hated Mrs. Medlock at the moment, but she hated her more the next.

"You didn't hear anything of the sort," said the housekeeper. "You come along back to your own nursery or I'll box your ears."

And she took her by the arm and half pushed, half pulled her up one passage and down another until she pushed her in at the door of her own room.

"Now," she said, "you stay where you're told to stay or you'll find yourself locked up. The master had better get you a governess, same as he said he would. You're one that needs some one to look sharp after you. I've got enough to do."