The next day Mark received a letter at the office where he was employed. On the left-hand upper corner was the imprint:

Luther Rockwell,
Broker and Banker.

"He is going to take you into partnership, 79," said A. D. T. 80.

"If he does I'll make you my office-boy," said Mark in a jocular tone. "I hope the old gentleman has quite recovered from his dynamite scare."

CHAPTER XXIII.
MARK'S GOOD LUCK.

Mark presented himself at Mr. Rockwell's office at eleven o'clock.

The letter which he had received was a simple invitation to call, signed by the banker himself.

"Is Mr. Rockwell in?" he asked.

"Yes," said the clerk smiling pleasantly, for Mark was a favorite in the office.

Mark went over to the open door, and stood on the threshold with his hat in his hand.