He turned into one of the district messenger offices, where he was warmly greeted by the manager.

"Ah, Wilson, I see you have not forgotten the little case in which I had the good fortune to help you?"

"No, sir, indeed I have not. You saved my good name, and perhaps my life."

"My dear fellow, you exaggerate. I have some recollection, Wilson, that you had among your boys a lad named Cartwright, who showed some ability during the investigation."

"Yes, sir, he is still with us."

"Could you ring him up?—thank you! And I should be glad to have change of this five-pound note."

A lad of fourteen, with a bright, keen face, had obeyed the summons of the manager. He stood now gazing with great reverence at the famous detective.

I brought Cartwright down with me—you remember the little chap at the express office—and he has seen after my simple wants: a loaf of bread and a clean collar. What does man want more? He has given me an extra pair of eyes upon a very active pair of feet, and both have been invaluable."

"I have sent a report from Grimpen to Princetown as to the death of Selden. I think I can promise that none of you will be troubled in the matter. And I have also communicated with my faithful Cartwright, who would certainly have pined away at the door of my hut, as a dog does at his master's grave, if I had not set his mind at rest about my safety."