"I protracted my visit as long as possible, and, while I maintained a most animated discussion with the Minister, upon a topic which I knew well had never failed to interest and excite him, I kept my attention really riveted upon the letter. In this examination, I committed to memory its external appearance and arrangement in the rack; and also fell, at length, upon a discovery which set at rest whatever trivial doubt I might have entertained. In scrutinizing the edges of the paper, I observed them to be more _chafed_ than seemed necessary. They presented the _broken_ appearance which is manifested when a stiff paper, having been once folded and pressed with a folder, is refolded in a reversed direction, in the same creases or edges which had formed the original fold. This discovery was sufficient. It was clear to me that the letter had been turned, as a glove, inside out, re-directed, and re-sealed. I bade the Minister good-morning, and took my departure at once, leaving a gold snuff-box upon the table.
"The next morning I called for the snuff-box, when we resumed, quite eagerly, the conversation of the preceding day. While thus engaged, however, a loud report, as if of a pistol, was heard immediately beneath the windows of the Hotel, and was succeeded by a series of fearful screams, and the shoutings of a mob. D---- rushed to a casement, threw it open, and looked out. In the meantime, I stepped to the card-rack, took the letter, put it in my pocket, and replaced it by a facsimile (so far as regards externals), which I had carefully prepared at my lodgings--imitating the D---- cipher, very readily, by means of a seal formed of bread.
"The disturbance in the street had been occasioned by the frantic behavior of a man with a musket. He had fired it among a crowd of women and children. It proved, however, to have been without ball, and the fellow was suffered to go his way as a lunatic or a drunkard. When he had gone, D---- came from the window, whither I had followed him immediately upon securing the object in view. Soon afterwards I bade him farewell. The pretended lunatic was a man in my own pay."
"But what purpose had you," I asked, "in replacing the letter by a facsimile? Would it not have been better, at the first visit, to have seized it openly, and departed?"