"I don't think I have another card, sir."
"Then take one of mine."
Mark glanced at the card offered him.
Henry Swan.
Watches, Diamonds, Jewelry.
No. 185-1/2 Broadway.
"Were that young man's diamonds bought at your store," asked Mark smiling.
"They were only paste. They might deceive a novice, but I saw through them at once. But I must bid you good morning. I have to make a call at the Fifth Avenue Hotel."
A few blocks farther on the old lady got out.
Mark assisted her to the street.
"You're a very polite boy," she said. "You've done me a great favor. You had better take the five dollars I offered you."
"No, thank you, madam. I will wait till I have a chance to do you another service."