"I only wish I knew it. If so, I might perhaps escape my enemies. But they are much too ingenious. They have laid their plans far too well." She referred, I supposed, to the way in which those scoundrels had forced money from her by threats. She was surely not alone in her terrible thraldom. The profession of the blackmailer in London is perhaps one of the most lucrative of criminal callings, and also one of the safest for the criminal. A demand can cleverly insinuate without making any absolute threat, and the blackmailer is generally a perfect past-master of his art. The general public can conceive no idea of the widespread operations of the thousands of these blackguards in all grades of society. When secrets cannot be discovered, cunning traps are set for the unwary, and many an honest man and woman is at this moment at the mercy of unscrupulous villains, compelled to pay in order to hush up some affair of which they are in reality entirely innocent. No one is safe. From the poor squalid homes of Whitechapel to the big mansions of Belgravia, from garish City offices to the snug villadom of Norwood, from fickle Finchley to weary Wandsworth, the blackmailer takes his toll, while it is calculated that nearly half the suicides reported annually in London are of those who take their own lives rather than face exposure. The "unsound mind" verdict in many instances merely covers the grim fact that the pockets of the victim have been drained dry by those human vampires who, dressed smugly and passing as gentlemen, rub shoulders with us in society of every grade. I looked at Sybil, and wondered what was the strange secret which she had been compelled to hush up. Those letters I had filched from the dead man were all sufficient proof that she was a victim. But what was the story? Would she ever tell me? I looked at her sweet, beautiful face, and wondered. We moved on again, slowly skirting the picturesque lake. She would not allow me to release myself from my bond, declaring that I must still pose as William Morton, compositor. "But everyone knows we are not married," I said. "Mrs Rumbold, for instance!" "Not everyone. There are some who believe it, or they would not hesitate to attack me," was her vague and mysterious response. "For my own part, Tibbie, I think we've carried the masquerade on quite long enough. I'm beginning to fear that Jack, or some of his friends, may discover us. Your description is circulated by the police, remember; besides, my prolonged absence has already been commented upon by your people. Jack and Wydcombe have been to my rooms half a dozen times, so Budd says." "No. They will not discover us," she exclaimed, quite confidently.