“All right, I’ll be on hand in the morning,” promised Nelson.

“I have been saving a surprise for you, Frank,” said his mother, as he rejoined her about nine o’clock. “What do you think? Your friend, Mr. Gregson, insisted on leaving you twenty-five dollars.”

“Oh, that won’t do at all!” cried Frank instantly.

“The professor, who was with him, insisted that it must. Besides, they left all sorts of kind regards for you.”

Frank’s was a truly grateful heart. It had been a splendid day for him. He took up a lamp and went downstairs, whistling happily.

“There’s a lot of work to do here,” he said, going from box to box, flashing the light across the contents. “There must be a million needles in that packing case. Poor Morton’s apple corer—there’s several thousands of those. And here’s a great jumble of lawn mower repair material.”

Frank stood mapping out how he would handle the mass of stuff. About to leave the room, he set down the lamp and curiously inspected the zinc box that had apparently been the burned-out hardware man’s safe.

It was filled with papers of various kinds: receipted bills, statements of accounts and letters. Many of these latter were from mail customers who had bought the apple corer and were dissatisfied with its operation.

Many of the papers were partly burned away. All were grimed with smoke. Finally from the very bottom of the box Frank fished up a square package. Opening this, he found it to be some part of a mail order office equipment.

Frank’s eye sparkled. There were several sheets of cardboard. On each of them a colored map of a State of the Union was printed. Each town had a hole near it. This was to hold minute wooden pegs of different hues, each color designating “written to,” or “first customer,” or “agent,” and the like.