As for the guilty person or persons in this strange case, they will be unable to escape us, our nets will be spread far and wide over this great city, and suddenly, in the streets and places of public resort, we shall in some way or other be made aware that we are in touch with the unknown criminal. Indeed I almost fancy I see him slowly approaching this quiet square of yours; he is loitering at street corners, wandering, apparently without aim, down far-reaching thoroughfares, but all the while coming nearer and nearer, drawn by an irresistible magnetism, as ships were drawn to the Loadstone Rock in the Eastern tale. "