In my helplessness I could do nothing but remain silent, and keep my terrible secret to myself. Unable either to communicate with the police or seek the assistance of my friend, I found that any endeavour to seek a solution of the problem was mere sowing of the wind. My thoughts hour by hour, as I sat alone in my dingy room, my poor blind eyes a black void, were of the ghastly affair, and in all its phases I considered it, trying to find some motive in the subsequent actions of the unscrupulous persons into whose hands I had had the misfortune to fall. I heard of Dick through the office of his journal. He was down with fever at some outlandish place on the Afghan frontier, and would certainly not be home for a couple of months or so. At first I was puzzled how to get rid of my soiled and blood-stained clothes so that Parker should not discover them, and at last hit upon the expedient of making them into a bundle and going forth one night when she was over at Kennington with her daughter Lily, the dancing-girl, and casting them into the Thames from the Embankment. It was a risky operation, for that part of London is well guarded by police after dark; nevertheless I accomplished it in safety, and was much amused a few days later by reading in an evening paper that they had been found near London Bridge and handed over to the river police, who, of course, scented a mystery. The blood-stains puzzled them, and the journal hinted that Scotland Yard had instituted inquiries into the ownership of the discarded suit of clothes. The paragraph concluded with that sentence, indispensable in reporting a mystery, "The police are very reticent about the matter." Fortunately, having cut out the maker's name, and taken everything from the pockets which might serve as a clue to ownership, I felt perfectly safe, and eagerly read the issue of the same journal on the following evening, which told how the stains had been analysed, and found to be those of human blood. A little more than a week had passed since my remarkable midnight adventure, when one morning I received a brief note by post, which Parker read to me. It consisted of only two typewritten lines stating that at mid-day I would receive a visitor, and was signed with the strange word "AVEL." It was, I knew, a message from Edna, and I dressed myself with greater care in expectation that she herself would visit me. In this, however, I was disappointed, for after existing some three hours on tiptoe with anxiety I found my visitor to be a well-spoken, middle-aged man, whose slight accent when introducing himself betrayed that he was an American. When we were alone, with the door closed, he made the following explanation-- "I have called upon you, Mr Heaton, at the request of a lady who is our mutual friend. You have, I presume, received a letter signed `Avel'?"