Enigmatical

"By the way," I asked suddenly, stopping and turning upon Stamford, "how the deuce did he know that I had come from Afghanistan?" My companion smiled an enigmatical smile. "That's just his little peculiarity," he said. " A good many people have wanted to know how he finds things out."

I dreamed that night of that enigmatical woman, Mary Cavendish.

He saw now clearly that the sole crew of the vessel was these two dead men, and though he could not see their faces, he saw by their outstretched hands, which were all of ragged flesh, that they had been subjected to some strange exceptional process of decay. For a moment his attention concentrated on those two enigmatical bundles of dirty clothes and laxly flung limbs, […]