You don't suppose for a moment, I hope, that a girl like Louisa would allow her mind to dwell on such horrors. Mysterious crimes in strange cities--and in London, too, for a matter of that--are, alas! of far too frequent occurrence to be quite as startling as they should be. A day or two later, Louisa Harris and her aunt, Lady Ryder, crossed over to England. They had spent five weeks in Italy and one in Brussels, not with a view to dreaming over the beauties of the Italian Lakes, or over the art treasures collected in the museums of Brussels, but because Lady Ryder had had a bronchial catarrh which she could not shake off and so her doctor had ordered her a thorough change. Bellaggio was selected, and Louisa accompanied her. They stayed at the best hotels both in Bellaggio and in Brussels, where Lady Ryder had several friends whom she wished to visit before she went home. Nothing whatever happened that should not have happened; everything was orderly and well managed; the courier and the maid saw to tickets and to luggage, to hotel rooms and sleeping compartments. It was obviously their mission in life to see that nothing untoward or unexpected happened, but only the obvious. It was clearly not their fault that Miss Harris had seen a cab in which an unknown man happened to have been murdered. Louisa, with a view to preventing her aunt from going to sleep after dinner and thereby spoiling her night's rest, had told her of the incident which she had witnessed in the Boulevard Waterloo, and Lady Ryder was genuinely shocked. She vaguely felt that her niece had done something unladylike and odd, which was so unlike Louisa. The latter had amused herself by scanning a number of English papers in order to find out what was said in London about that strange crime, which she had almost witnessed--the man stabbed through the neck, from ear to ear, and the wound so small it might have been done with a skewer. But, with characteristic indifference, London paid but little heed to the mysterious dramas of a sister city. A brief account of the gruesome discovery--a figurative shrug of the shoulders as to the incompetence of the Belgian police, who held neither a clue to the perpetrator of the crime nor to the identity of the victim. Just a stranger--an idler. Brussels was full of strangers just now. His nationality? who knows? His individuality? there seemed no one to care. The police were active no doubt, but so far they had discovered nothing. Two men, the murderer and the murdered, engulfed in that great whirlpool known as humanity, small units of no importance, since no one seemed to care. Interesting to the detective whose duty it was to track the crime to its perpetrator. Interesting to the reporter who could fill a column with accounts of depositions, of questionings, of examinations. Interesting to the after-dinner talker who could expatiate over the moral lessons to be drawn from the conception of such a crime.