It was towards the close of business hours that Mr. Marston, the head clerk, handed Rufus a tin box, saying, "Rufus, you may carry this round to the Bank of the Commonwealth."

"Yes, sir," said Rufus.

It was one of his daily duties, and he took the box as a matter of course, and started on his errand. When he first entered the office, the feeling that property of value was committed to his charge gave him a feeling of anxious responsibility; but now he had become used to it, and ceased to think of danger. Probably he would have felt less security, had he seen Mr. Martin prowling about on the opposite side of the street, his eyes attentively fixed on the entrance to Mr. Turner's office. When Martin saw Rufus depart on his errand, he threw away the cigar he had in his mouth, and crossed the street. He followed Rufus closely, unobserved by our hero, to whom it did not occur to look back.

"It's a risky business," thought Martin, rather nervously. "I wish I hadn't undertaken it. Ten to one I'll get nabbed."

He was more than half inclined to give up his project; but if he should do so he knew he would get into disgrace with his employers. Besides, the inducements held out to him were not small. He looked covetously at the tin box under the arm of Rufus, and speculated as to the value of the contents. Half of it would perhaps make him a rich man. The stake was worth playing for, and he plucked up courage and determined to proceed.

Circumstances favored his design.

Before going to the bank, Rufus was obliged to carry a message to an office on the second floor of a building on Wall Street.

"This is my opportunity," thought Martin.

He quickened his steps, and as Rufus placed his foot on the lower step of the staircase, he was close upon him. Hearing the step behind him, our hero turned, only in time to receive a violent blow in the face, which caused him to fall forward. He dropped the box as he fell, which was instantly snatched by Mr. Martin, who lost no time in making his escape.

The blow was so violent that Rufus was for the moment stunned. It was only for a moment, however. He quickly recovered himself, and at once realized his position. He knew, also, that it was Martin who had snatched the box, for he had recognized him during the instant of time that preceded the blow.