were in the nature of an instruction—then it would almost certainly be intended for Llewellyn—and he would scarcely be reminded in that particular way of anything about _himself_. Also would Stewart put initials if he were referring to the lady whom he looked upon as a daughter? Surely she would be ‘Marjorie’ to him, without any surname? No, gentlemen! I came to the conclusion that ‘M. L.’ stood for the abbreviated and incompleted form of ‘Merryweather, Linnell and Daventry.’” He paused and looked across at Peter, who allowed an exclamation of “By Jove!” to escape his lips. Goodall said laconically, “Go on!” Anthony proceeded. “Assuming this to be a sound theory, then—what had happened in the library that night to cause Stewart to scrawl the words? That was what I had to find out. It seemed to me pretty conclusive that if Merryweather, Linnell and Daventry were coming into the picture, then what I had suspected for some time was true—_that the kernel of the matter lay in the screen that I discovered to be missing from the Museum Room and in the strange coincidence of the murder at the Hanover Galleries with yet another missing screen_. I was indebted to Colonel Leach-Fletcher for the next important piece of assistance. Stewart, he informed us—you remember, Goodall—was very troubled about what he described as some treachery happening in his house. Private papers and documents were being tampered with. Was this the same trouble that he was feeling over his son? I decided no! Mr. Charles Stewart here had no reason to acquire information from his father by stealth or underhand methods. He could have obtained it in the open—in many ways. I then began to center my suspicions upon two people—Llewellyn and Butterworth. Also, I considered the evidence of Patrick O’Connor’s bicycle. I was able to establish—with your help, Inspector, that communication had undoubtedly passed on the night of the crime between the murderer this end and Blanchard’s Hotel. Something had happened suddenly down here that made the immediate acquisition of the tapestry screen imperative—it was to be obtained at any cost! Then I reconstructed the crime—finding the missing bullet and the weapon that the murderer had used. The location of the bullet was most interesting—but of that more later. Also I found the answer to my question as to what was making Llewellyn so uneasy. It was a love-interest—concerned at the moment with a love-letter! I began to think seriously then about Butterworth—John Butterworth, the trusted butler. ‘Treachery,’ you will agree, is a good interpretation of betrayed trust. This is what I think happened on the night of the murder.” He stopped again to light a cigarette. “We know that Stewart had confided to the Colonel that he intended to take immediate steps to probe the treachery that he imagined was going on around him. In my opinion he had formed certain suspicions and intended to take action, that very night. But something