"Don't leave me!" said the old lady. "My nerves are so upset that I don't like being left alone."

"I am quite at your service, madam," replied Luke, politely. "Shall I put you on board the cars?"

"No, call a carriage, please."

This was easily done, for they were in front of the Palmer House, where a line of cabs may be found. Luke called one, and assisted the old lady inside.

"Where shall I tell the driver to take you?" he asked.

The old lady named a number on Prairie Avenue, which contains some of the finest residences in Chicago.

"Can I do anything more for you?" asked our hero.

"Yes," was the unexpected reply. "Get in yourself, if you can spare the time."

"Certainly," assented Luke.

He took his seat beside the old lady.