I felt convinced that it was. The truth was plain. There was a plot against Sybil. The cab had been in waiting there to convey the victim to her grave! CHAPTER TWENTY TWO. IS AN ECHO FROM CHARLTON WOOD. My bitterest regret was that I had not been able to follow Parham and trace him to the house of doom, but at the moment of his disappearance I had been unable to emerge from my hiding-place, otherwise the girl O'Hara would have seen me. Perhaps, indeed, she might have recognised me. So, by sheer force of adverse circumstances, I was compelled to remain there and see the trio escape under my very nose. I had learnt one important fact, however, namely, that a deep conspiracy was afoot against Sybil. It was beyond comprehension how Tibbie, daughter of the noble and patrician house of Scarcliff, could be so intimately associated with what appealed to me to be a daring gang of malefactors. The treatment I had received at their hands showed me their utter unscrupulousness. I wondered whether what the police suspected was really true, that others had lost their lives in that house wherein I had so nearly lost mine. What was the story of Tibbie's association with them--a romance no doubt, that had had its tragic ending in the death of the unknown in Charlton Wood. To me, it seemed plain that he was a member of the gang, for had he not their secret cipher upon him, and did not both Winsloe and Parham possess his photograph? I recollected the receipt for a registered letter which I had found among the letters in the dead man's pocket, and next morning told Budd to go and unlock the drawer in my writing-table and bring it to me. He did so, and I saw that the receipt was for a letter handed in at the post-office at Blandford in Dorset, addressed to: "Charles Denton, 16b Bolton Road, Pendleton, Manchester." I turned over the receipt in my hand, wondering whether the slip of paper would reveal anything to me. Then, after some reflection, I resolved to break my journey in Manchester on my return to Tibbie in Carlisle, and ascertain who was this man to whom the dead unknown had sent a letter registered. Next afternoon I passed through Salford in a tram-car, along by Peel Park, and up the Broad Street to Pendleton, alighting at the junction of those two thoroughfares, the one leading to aristocratic Eccles and Patricroft, and the other out to bustling Bolton. The Bolton road is one over which much heavy traffic passes, and is lined with small houses, a working-class district, for there are many mills and factories in the vicinity. I found the house of which I was in search, a small, rather clean-looking place, and as I passed a homely-looking woman was taking in the milk from the milkman. Without hesitation I stopped, and addressing her, exclaimed,-- "Excuse me, mum, but do you happen to know a Mr Charles Denton?"