The child must have been keeping a close watch.

Save for the signature it contained but one line: "I have accepted." Joan replaced the letter in its envelope, and laid it down upon the desk.
Unconsciously a smile played about her lips.
The child was watching her.

"I'm glad you persuaded him," she said.
Joan felt a flush mount to her face.

She had forgotten Hilda for the instant.
She forced a laugh.

"Oh, I only persuaded him to do what he had made up his mind to do," she explained.