When Oliver Ripple was gone, Hamilton Dart smiled broadly to himself.

"Three of them," he murmured. "That's not so bad, after all. I wonder if that chap who was to come at half-past ten will show up?"

When Nat left the post office he found no letters for Samuel Barrows.

"Mr. Dart will be disappointed again," he thought. "But it is not my fault."

The afternoon passed quietly. Only one man called at the office, and when he found Hamilton Dart was not in he disappeared immediately.

That evening Nat gave Dick another lesson, for which the newsboy was very grateful.

"No wonder you got that job," said Dick. "You can figure like lightning, and write fine, too."

"I don't have to figure much at the office."

"How do you like your boss?"

"I haven't really seen enough of him to make up my mind."