Knox was off like a shot, and in a very few minutes all my men were with me.

"Green," I said, "go to your hotel, pay your bill, and proceed to the Pattmore House. When you register your name, you must hail the clerk as an old acquaintance. This will be an easy matter, as hotel clerks are known by hundreds of people. Miller, you must be in the office at the same time, and you must both remain there until Pattmore puts his letter in the mail-box. Then, Green you must ask the clerk out to take a drink, and while you are gone, Miller must get possession of the letter. When you have secured it, come over to the Globe Hotel, where I am stopping."

Green hurried off to the Clarendon House to get his carpet-bag, and Miller returned to the Pattmore House. I also sent Knox to watch Pattmore, and to follow him wherever he might go, until he retired for the night.

Soon after Miller reached the office, Pattmore came down stairs with a letter, which Miller carefully scrutinized, so as to be able to recognize it among a group of others.

"Has the mail for the West closed yet?" asked Pattmore.

"No," replied the clerk, "there is still about an hour to spare."

Pattmore then dropped his letter into the mail-box and went out. At this moment Green stepped up to the desk, registered his name, and asked for a room. As the clerk was attending to his room and baggage, Green looked intently at him, as if trying to recall his name. Then, stepping forward, he said, cordially:

"Why, how are you? When did you come here? Let me see; the last time I saw you was at a hotel in Buffalo, wasn't it?"

This was a lucky guess, for the clerk replied:

"Havn't you seen me since then? Why, I left there over a year ago."