“Last November, I felt myself in a position to seek my first victim. I decided that it should be Mr. Tovey, a personal friend of Mr. Copperdock, from whom I had learnt all I required to know about his habits. I had, among my other weapons, a paper cutter’s knife, with half a dozen blades. These blades I had sharpened along both edges until they resembled daggers, and I had discovered a means of fixing them lightly into the handle, so that they would remain in the wound, leaving me free to carry off the handle.