Then Hal began to speculate on the foot-marks on the window-sill. If the thief had entered the office that way, why were not some of the same marks visible on the carpet in front of the safe?

When Hardwick went out to lunch, Hal watched him from the office window. At the corner he saw the book-keeper joined by Dick Ferris, and the two seemed to be in earnest conversation as they walked along.

When Hardwick came back Hal was given a half hour. The boy put on his hat and coat and went out. He did not feel like eating, and he walked up to the corner and around to the back street, intending to pay a visit to the alley through which the robber was supposed to have escaped.

Just as he was about to turn into the narrow place, now piled high with snow, somebody caught him by the shoulder. Turning, he found himself confronted by Dick Ferris.

"Hullo, there!" said the tall boy.

"How are you?" returned Hal coldly.

"I hear you've got my place," went on Ferris.

"What if I have?" asked Hal, abruptly.

"I thought you were hanging around trying to do me out of it."

"I didn't try to do you out of it. Mr. Sumner asked me to call at his office and I went. Then he offered me the place and I took it."