“The boy who lives at my house?” he asked, anxiously.

“No; the boy who usually calls for the factory mail. The nephew of your bookkeeper I think his name is Leonard Craig.”

“Ah, I see,” said Mr. Jennings, looking very much relieved. “And you say he deposited both letters?”

“Yes, sir.”

“Do you happen to remember if any other letter like this was received at the office?”

Here he displayed the envelope of Carl’s letter.

“Yes; one was received, addressed to the name of the one who deposited the first letters—Leonard Craig.”

“Thank you, Mr. Sweetland. Your information has cleared up a mystery. Be kind enough not to mention the matter.”

“I will bear your request in mind.”

Mr. Jennings bought a supply of stamps, and then left the office.