There were dozens of persons passing and repassing in the street at the time of the occurrence, nevertheless, so swiftly and surely was the blow dealt and the seal attached, that before a crowd had assembled, the unfortunate young artiste had expired.

This created little less than a panic.

By the existence of the seals—each of which corresponded in every detail with the others—the fact was proved that the murders, if not committed by the same hand, were within the knowledge of the same person. This, of course, was a peculiar element in the case, and not a little speculation was indulged in as to what was the chief motive leading to the commission of crimes so outrageous.

The next dastardly affair caused a thrill of amazement and horror through the whole of Europe.

Mr Joseph Glossop, member of the House of Commons, and one of Society’s shining lights, had been found dead in bed at his house in Mount Street, Grosvenor Square, in most curious circumstances. True, the deceased had met with his death much in the same manner as the three previous victims, and he seal was present in exactly the same form, yet the window of the room was securely fastened, and the door locked.

This catastrophe caused the hearts of the three great capitals to throb with fear and indignation and the efforts of the police were redoubled. The same result—or lack of result—followed all their endeavours, however, and again nothing was discovered of the assassin who so ruthlessly took the lives of his unoffending fellow-men.

The police were utterly powerless, for the marvellous, almost superhuman, swiftness with which the fell deeds were accomplished, and the manner in which the murderer gained access to his victims, were two points which were entirely incomprehensible.

But while this situation was bad enough, it was nothing when compared with the complete paralysis which took possession of the entire population when, a few weeks later, the work of the same dreadful hand was observed, this time at Zurich, where Madame Daburon—a celebrated authoress, whose works, principally on political questions, and of a Socialistic tendency, had attracted a great deal of attention—was found lying in the bottom of a pleasure boat drifting upon the Lake.

The discovery was made by a party of tourists who were out sailing, and their dismay may be readily imagined when they found the unfortunate woman had been shot in the breast, and the seal placed upon her.

There were neither oars nor rudder to the boat, yet from the presence of blood it was plain that the shot was fired after the murdered woman had embarked, and it was more than probable that the assassin, before escaping, threw both oars and rudder overboard. How he landed was a mystery.