"Well," said he, "I don't know his name. The fact is nobody knows him around here. He usually drives up in a buggy about nightfall, calls for letters addressed to X. Y. Z., and having got them, whips up his horse and is off again before one can say a word." "Describe him," said I. "Well, he is very lean and very lank. In appearance he is both green and awkward. His complexion is pale, almost sickly. Were it not for his eye, which is keen and twinkling, I should call him an extremely inoffensive-looking person." The type was not new to me. "I should like to see him," said I. "You will have to wait till nightfall, then," returned the postmaster. "He never comes till about dusk. Drop in here, say at seven o'clock, and I will see that you have the opportunity of handing him his mail." I nodded acquiescence to this and sauntered out of the enclosure devoted to the uses of the post-office. As I did so I ran against a young man who was hurriedly approaching from the other end of the store. "Your pardon," he cried; and I turned to look at him, so gentlemanly was his tone, and so easy the bow with which he accompanied this simple apology. He was standing before the window of the post-office, waiting for his mail; a good-looking, well-made young man, of a fine countenance, but with a restless eye, whose alert yet anxious expression I could not but note even in the casual glance I gave him. There appeared to be some difficulty in procuring him his mail, and each minute he was kept waiting seemed to increase his impatience almost beyond the bounds of endurance. I saw him lean forward and gasp out a hurried word to the postmaster, and was idly wondering over his anxiety and its probable causes, when I heard a hasty exclamation near me, and looking around, saw the postmaster himself beckoning to me from the door of the enclosure. I immediately hastened forward. "I don't know what it means," he whispered; "but here is a young man, different from any who have been here before, asking for a letter addressed to X. Y. Z." "A letter?" I repeated. "Yes, a letter." "Give him the whole batch and see what he does," I returned, drawing back where I could myself watch the result of my instructions. The postmaster did as I requested. In another moment I saw the young man start with amazement as a dozen letters were put in his hand. "These are not all for me!" he cried, but even as he made the exclamation, drew to one side, and with a look of mingled perplexity and concern, began opening them one after another, his expression deepening to amazement as he glanced at their contents. The one in the blue envelope, however, seemed to awaken quite different emotions. With an unconscious look of relief, he hastily read the short letter it contained, then with a quick gesture, folded it up and thrust it back into the envelope he held, together with the other letters, in his left hand.