"No thanks, Susan," Penny excused herself. "I just thought of a place I want to stop and it isn't on your route. See you tomorrow."

The cab door slammed and Susan was whisked away to her appointment. Penny walked rapidly toward the poorer section of the business district. She finally stopped at the entrance of the building where the previous day she had encountered the mysterious man in gray and the arrogant janitor.

Penny walked into the stuffy little lobby at the foot of a steep stairway. She consulted a dilapidated office directory which hung haphazardly against the wall. The building was tenanted by small factories, printers, and agents. About half the spaces in the directory were blank, indicating the place was only partially occupied. She was interested to see that the top floor showed no tenants whatsoever.

"I think I'll just slip up there and see for myself," she resolved. With her foot on the first step, she looked quickly about. There was no one nearby to witness her actions. All was quiet except for the rhythmical thumping of small job presses in the scattered printing shops.

Penny thought there could hardly be so many steep steps in all the world as she climbed flight after flight, hoping each to be the last. Finally she reached the top landing. She tiptoed to the nearest door and listened. Hearing nothing, she opened it a crack and looked in.

The place was empty.

"That's queer," she thought. "I'm sure this top floor was rented yesterday. I saw the man pay the rent."

Walking as noiselessly as she could, Penny explored the large room. Here and there on the bare floor were colored splotches, as if someone had spilled paint. In one corner was a dirty piece of tarpaulin such as tradesmen use to protect floors and furniture.

Disappointed, Penny retreated to the hallway. She could not understand why the place was empty when she had been told by the janitor only the day before that it was occupied.

She walked slowly down the first flight of stairs and as she turned on the landing to continue her descent, she noticed the name, "James Wilson, Printer," on a glass door directly in front of her.