"You don't understand," cried Dorothy. "I mean, have you ever been on a big ship floating on a big ocean?"
"Don't know," said he.
"Then why do you wear sailor clothes?"
"Don't know," he answered, again.
Dorothy was in despair.
"You're just awful stupid, Button-Bright," she said.
"Am I?" he asked.
"Yes, you are."
"Why?" looking up at her with big eyes.
She was going to say: "Don't know," but stopped herself in time.