William Le Queux,
The Czar's Spy — Chapter 6: The Gathering of the Clouds
(1905)
“ She agreed with me, but expressed a belief that the double crime had been committed alone and unaided."Have you any idea as to the motive?" I asked her, eager to hear her reply."Well," she answered hesitatingly, "if the woman has fallen a victim, the motive will become plain; but if not, then the matter must remain a complete mystery.""You tell me, Miss Muriel, that you suspect the truth, and yet you deny all knowledge of the murdered man!" I exclaimed in a tone of slight reproach."Until we have cleared up the mystery of the woman I can say nothing," was her answer. ”
