She wondered what he could mean, but she could get no enlightenment from his face, which preserved a sphinx-like impenetrability.

"What are you thinking of?" she asked.

"How best to help you."

"I'm not in need of help: besides, I can take care of myself."

"H'm! Where were you going when I met you?"

"Shopping."

"May I come too?"

"It wouldn't interest you."

"How long can you spare?"

"Not long. Why?"