A robbery of plate had been committed in Portman-square, with an ingenuity and boldness which left no doubt that it had been effected by clever and practiced hands. The detective officers first employed having failed to discover the offenders, the threads of the imperfect and broken clew were placed in my hands, to see if my somewhat renowned dexterity, or luck, as many of my brother officers preferred calling it, would enable me to piece them out to a satisfactory conclusion. By the description obtained of a man who had been seen lurking about the house a few days previous to the burglary, it had been concluded by my predecessors in the investigation that one Martin, a fellow with half-a-dozen _aliases_, and a well-known traveler on the road to the hulks, was concerned in the affair; and by their advice a reward of fifty pounds had been offered for his apprehension and conviction. I prosecuted the inquiry with my usual energy and watchfulness, without alighting upon any new fact or intimation of importance. I could not discover that a single article of the missing property had been either pawned or offered for sale, and little doubt remained that the crucible had fatally diminished the chances of detection. The only hope was, that an increased reward might induce one of the gang to betray his confederates; and as the property was of large value, this was done, and one hundred guineas was promised for the required information. I had been to the printer's to order the placards announcing the increased recompense; and after indulging in a long gossip with the foreman of the establishment, whom I knew well, was passing at about a quarter past ten o'clock through Ryder's-court, Newport-market, where a tall man met and passed me swiftly, holding a handkerchief to his face. There was nothing remarkable in that, as the weather was bitterly cold and sleety; and I walked unheedingly on. I was just in the act of passing out of the court toward Leicester-square, when swift steps sounded suddenly behind me. I instinctively turned; and as I did so, received a violent blow on the left shoulder--intended, I doubted not, for the nape of my neck--from the tall individual who had passed me a minute previously. As he still held the handkerchief to his face, I did not catch even a momentary glance at his features, and he ran off with surprising speed. The blow, sudden, jarring, and inflicted with a sharp instrument--by a strong knife or a dagger--caused a sensation of faintness; and before I recovered from it all chance of successful pursuit was at an end. The wound, which was not at all serious, I had dressed at a chemist's shop in the Haymarket; and as proclaiming the attack would do nothing toward detecting the perpetrator of it, I said little about it to any one, and managed to conceal it entirely from my wife, to whom it would have suggested a thousand painful apprehensions whenever I happened to be unexpectedly detained from home.