During the whole of the author's official career, he has never been brought into physical conflict with any one, nor exposed to any great danger in the discharge of his duties. These duties have seldom called him to undergo "moving accidents by flood and field," excepting so far as severe weather, dangerous roads, fractious horses, or some other of the inconveniences and perils incident to the different modes of traveling, might be classed under that head. An incident, however, once occurred while I was engaged in investigating a case of depredation, which may be worthy of record here, as it is not devoid of a certain picturesqueness, even aside from the extremely interesting circumstance (to me) that my head, for a short time, seemed to be in imminent danger. The case referred to was that of the loss of a letter containing six hundred dollars, posted by the cashier of a Northern bank. The person, (a post-office clerk,) whom I suspected of being the robber, was detected in taking a decoy letter which was placed in his office after the loss of the one first mentioned. On the strength of this, I boldly charged him with the first loss, and insisted that he should restore the money. After the usual assertion of innocence, and some demur, he intimated to me that the spoils were hidden somewhere in the post-office. This interview was held in the directors' room of the bank which had suffered the loss, and I immediately proposed that we should go over to the office and get the money. Accordingly we proceeded thither. It was then after midnight. As soon as we entered, my companion locked the door behind us, and preceded me, with a lantern in his hand. A remark which I made respecting the lonely appearance of a post-office at that time of night, drew from him nothing but a sullen assent, which put an end to any further conversational efforts on my part. The room (or rather recess) in which he lodged, was over that part of the office devoted to the public, a space in front of the boxes, and access was had to it by means of a ladder inside the office. The clerk rapidly ascended this ladder and I followed closely behind, without a word being spoken by either of us. The apartment, besides the ordinary furniture of a lodging-room, contained a few shelves of books, indicating some pursuit more creditable to their owner than those which had rendered my interference with them necessary. I had before been told that he was somewhat diligent in the cultivation of his intellect. Setting down his lantern upon the table, he reached up and took down a rifle which was suspended to the wall, directly over his bed, a fit emblem for one engaged in _rifling_ the mails. Although the moodiness which he had displayed during our intercourse that evening, had not surprised me, yet I was by no means prepared to expect that he would resort to such extreme measures as his movements seemed to indicate.