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.
The banker looked up.
"Oh, it is my young friend the messenger boy!" he said cordially, holding out his hand.
"I hope you are quite recovered, sir," said Mark respectfully.
"Yes, I believe so. The visit of our dynamite friend was quite a shock to me, and at my age it takes longer to recover from the effects of such an incident than at yours. You must not think that I have forgotten what a service you rendered me."
"I am very glad to have done you a service, sir, but I am afraid I must confess that I was thinking partly of myself."